Diamond Certified Companies are Rated Highest in Quality and Helpful Expertise.

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Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified Plumbing Companies Rated Highest in Quality?

Photo: Roman’s Plumbing, Inc. (2016)

You are the customer. If your goal is to choose a plumbing company that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified plumbing contractor. Each has been rated Highest in Quality in the most accurate ratings process anywhere. And you’re always backed by the Diamond Certified Performance Guarantee. Here’s why the Diamond Certified ratings and certification process will help you find a top-rated plumbing company and is unparalleled in its accuracy, rigor and usefulness:

1) Accuracy: All research is performed by live telephone interviews that verify only real customers are surveyed, so you’ll never be fooled by fake reviews.

2) Statistical Reliability: A large random sample of past customers is surveyed on an ongoing basis so the research results you see truly reflect a Diamond Certified company’s top-rated status.

3) Full Disclosure: By clicking the name of a company above you’ll see the exact rating results in charts and read verbatim survey responses as well as researched articles on each qualified company.

4) Guaranteed: Your purchase is backed up with mediation and the Diamond Certified Performance Guarantee, so you can choose with confidence.

Click on the name of a Diamond Certified company above to read ratings results, researched articles and verbatim customer survey responses to help you make an informed decision.

More than 200,000 customers of local companies have been interviewed in live telephone calls, and only companies that score Highest in Quality in customer satisfaction–a 90+ on a 100 scale–as well as pass all of the credential-based ratings earn Diamond Certified. By requiring such a high score to qualify, the Diamond Certified program eliminates mediocre and poorly performing companies. Read detailed information about the ratings and certification process.

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Roman Scanagatta is a 21-year veteran of the plumbing industry and owner of Roman’s Plumbing, Inc., a Diamond Certified company since 2011. He can be reached at (707) 948-6178 or by email.

Roman Scanagatta

diamond certified contributor profile and expert article

Roman Scanagatta: Plumbing Opportunity

By James Florence, Diamond Certified Resource Reporter

PETALUMA — As soon as he reached adulthood, Roman Scanagatta took advantage of a professional opportunity that would set him up for long-term success. “After high school, my fiancée and I wanted to get married, so I knew I needed to find a career that would pay the bills,” he explains. “I had a friend who was apprenticing at a local plumbing company, so I asked if he could get me an apprenticeship as well. Basically, I figured learning a trade would give me skills I could take anywhere, so when I saw the opportunity to do so, I went for it.” After working for the same company for 15 years, Roman founded his own plumbing business in 2010.

Today, as owner of Roman’s Plumbing, Inc., Roman says his favorite part of his job is its dynamic character. “I love being out and about, working at a different location every day and encountering new problems to solve. I also enjoy the opportunity to meet new people—in fact, a lot of my former clients have become good friends of mine.”

A resident of Petaluma (where he lives with his wife, Eleni, and their two daughters), Roman expresses his appreciation for its quaint yet cultured character. “Petaluma is a great town. It has grown a lot over the years but still managed to maintain its small-town feel. It’s also located at the edge of Marin and Sonoma Counties, which enables our company to service a sizeable area.”

When he’s not working, Roman can usually be found with his family. “As a business owner, I don’t have a lot of down time, so when I get it, I like to spend it with my girls,” he affirms. “One of my favorite activities is making food with my daughters. I’ve always enjoyed cooking and actually considered becoming a chef before I became a plumber. I taught my daughters how to cook and bake, and now they’re better at it than me.” Roman also enjoys attending his daughters’ sporting events (“My younger daughter plays basketball and my older daughter plays volleyball.”) and going on dates with his wife.

In regard to his professional career, Roman says he’s a big proponent of customer education. “We make it a point to give our customers options and help them make informed decisions. Plumbers often get the reputation of being rip-off artists who take advantage of unknowing people, so we’re always working hard to change that perception. Basically, it all comes down to educating customers and taking care of them the same way we take care of our own families.”

When asked the first thing he’d do if he were to retire tomorrow, Roman says he’d take an international vacation. “My wife has family in Greece, so if I were to retire, I’d probably book a trip there with my family. I’d also bring along a few books. I love to read but I never have time for it, so I’d take the opportunity to catch up on my reading.”

Ask Me Anything!

Q: What’s your favorite book?
A: “The Sicilian” by Mario Puzo.

Q: What’s your favorite sports team?
A: The San Francisco Giants.

Q: What’s your favorite local restaurant?
A: Mi Pueblo in Petaluma.

Q: If you could travel anywhere in the world, where would you go?
A: Italy—I’m of Italian heritage and I still haven’t been there.

Q: What’s your favorite thing to eat for dessert?
A: New York cheesecake.

Read more

A Better Choice for Water Filtration


PETALUMA – If you want to have filtered drinking water in your home, you have a couple of options. One is a reverse osmosis system, which is effective at removing chlorine, lead and volatile organic compounds (VOCs) found in tap… Read more

Expert Video Tip

Video: Plumbing Water Saving Tips

Complete Video Transcription:

PETALUMA – Host, Sarah Rutan: When it comes to saving water in your home, there are a couple of things you might not be aware of.… Read more

Cameron Mason is a 25-year veteran of the plumbing industry and owner of Mason Plumbing, Inc., a Diamond Certified company. He can be reached at (415) 484-6836 or by email.

Cameron Mason

diamond certified contributor profile and expert article

Cameron Mason: An Unplanned Profession

By James Florence, Diamond Certified Resource Reporter

SAN ANSELMO — When Cameron Mason started plumbing to pay his way through college, he never thought it would become his primary livelihood. “I worked as a plumber while earning my degree in physical therapy,” he explains. “After graduating, I did an internship with a local physical therapist, but eventually I realized it wasn’t for me. I had fond memories of plumbing, so I decided to return to the trade full-time. After completing my five-year apprenticeship, I started my own business.”

Today, as owner of Mason Plumbing, Inc., Cameron says his favorite part of his job is solving problems. “I enjoy going into a customer’s home, looking at the problem they’re having and coming up with a solution. As a plumber, every day brings a new challenge, as well as a new opportunity to help someone.”

A resident of Marin County (where he lives with his wife, Kamber, and their two children), Cameron expresses his appreciation for his longtime locale. “I was born and raised in Marin, so I feel very connected to my community. I really like the culture—it’s kind of a unique little bubble within the Greater Bay Area.”

Outside of work, Cameron spends the bulk of his time with his family. “During the last five years, my biggest hobby has been driving the kids to and from activities,” he laughs. “My son is a competitive swimmer and my daughter dances ballet, so I do a lot of chauffeuring.” When he’s not on call for child transportation, Cameron enjoys activities like mountain biking, working on his house and traveling. “We try to take a trip with the kids at least once every six months. We’ve been to Rome, Paris and Mexico, and we’re going to England later this summer.”

In his life and career, Cameron espouses the importance of integrity. “I believe in being a man of my word,” he affirms. “If I say I’m going to be somewhere at a certain time, I have to follow through with that. Basically, actions speak louder than words, and that’s what success in both life and business is all about.”

When asked about his future plans for retirement, Cameron says he doesn’t believe in bucket lists. “I’m already living the life I want to live. I work hard, but I get to have breakfast and dinner with my family every day, and I’m off nights and weekends. It’s a good balance, and you can’t ask for much more than that.”

Ask Me Anything!

Q: What’s your favorite sports team?
A: The San Francisco 49ers.

Q: What’s your favorite TV show?
A: “Fixer Upper.”

Q: Music or talk radio?
A: Music.

Q: What kinds of music do you enjoy?
A: I’m all over the place—I’ll listen to anything from Edith Piaf to Rancid.

Q: If you could time travel, would you go to the past or the future?
A: I’d probably go to the future and try to figure out what we could do right now to make it better.

Read more

Benefits of Hot Water Recirculation


SAN ANSELMO — Growing up, I remember going to take my morning shower, turning on the water and then picking out my clothes while I waited two to three minutes for it to heat up. While this is still the case… Read more

Expert Video Tip

Video: Hot Water Recirculation Pumps

Complete Video Transcription:

SAN ANSELMO — Host, Sarah Rutan: If you’re looking for ways to conserve water in your home, your first step should be installing a hot water recirculation… Read more

Kyle Barnhart is vice president of Mike Testa Plumbing, Inc., a Diamond Certified company. He can be reached at (415) 868-5917 or by email.

Kyle Barnhart

diamond certified contributor profile and expert article

Kyle Barnhart: Gradual Growth

By James Florence, Diamond Certified Resource Reporter

SAN RAFAEL — Looking back on his plumbing career, Kyle Barnhart identifies a gradual progression of steady professional growth. “My entire career has basically been one big on-the-job learning experience,” he says. “It started in my childhood—my father was a plumber and he used to take me with him to jobsites. I always had an interest in the trade, especially the troubleshooting aspect. You really have to use your brain, and a lot of times, it’s like figuring out a puzzle. After high school, I got a job with a general contractor I knew and things took off from there. In 2012, I was hired at Mike Testa Plumbing and I’ve been here ever since.”

As vice president of Mike Testa Plumbing, Inc., Kyle says his favorite part of his job is passing on his knowledge to rookie plumbers. “I do a little bit of everything here, from hands-on work to office management, but I particularly enjoy training our new employees. It’s good to see younger people with an interest in the trade, and I appreciate the opportunity to teach them the right way to do things.”

A resident of Petaluma (where he lives with his wife, Kaci, and their two daughters), Mike spends his time outside of work on a variety of pastimes. “I have a 2010 Harley-Davidson FXDC that I enjoy riding and working on,” he details. “I’m also a big reader and do a lot of small remodeling projects on our home.” Additionally, Kyle enjoys spending quality time with his family. “We try to keep our kids busy, because otherwise they go crazy. They’re involved in soccer and taekwondo, and we also take them to the park and go on family bicycle rides.”

In regard to his professional career, Kyle says honesty is the best policy. “I try to be upfront about everything with our customers. I don’t like to sugarcoat things. I find that a straightforward, honest approach helps ensure our customers get the best possible value and service.”

When asked the first thing he’d do if he were to retire tomorrow, Kyle says he’d plan a European vacation. “I’ve been to Europe once, but I’d like to go back for an extended length of time and bring my family. In particular, I’d like to tour the Nordic countries of Sweden, Iceland and Finland.”

Ask Me Anything!

Q: What’s your favorite local restaurant?

A: Sauced BBQ & Spirits in Petaluma.

Q: Are you an early bird or a night owl?

A: A night owl.

Q: What’s your favorite thing to do on a rainy day?

A: Stay inside, read and hang out with my kids.

Q: Music or talk radio?

A: Music.

Q: What’s your favorite snack?

A: Cookies—you can’t go wrong with those.

Read more

Maintaining Your Water Heater


SAN RAFAEL — Most water heater problems stem from a lack of routine maintenance. Over time, sediment and mineral buildup can inhibit a water heater’s efficiency and water flow, leading to subpar performance and even premature failure. Routinely flushing your traditional or… Read more

Expert Video Tip

Video: Maintaining Your Water Heater

Complete Video Transcription:

SAN RAFAEL — Sarah Rutan: Whether you have a traditional or tankless water heater, annual maintenance is crucial to ensure efficient operation. Today we’re in San Rafael with… Read more

Daniel Gagne is a lifetime veteran of the plumbing industry and owner of Benjamin Franklin Plumbing, a Diamond Certified company. He can be reached at (415) 788-4357 or by email.

Daniel Gagne

diamond certified contributor profile and expert article

Daniel Gagne: Plumbing Pride

By James Florence, Diamond Certified Resource Reporter

NOVATO — When Daniel Gagne began his plumbing career, he had no idea of the level of success he’d one day attain. “My dad was a plumber, so I was introduced to the trade at a very young age,” he recounts. “After high school, I worked for the family business for a while, and after doing some traveling in my 20s, I ended up in Marin County, where I got a job with a local plumbing company. In 1996, my brother and I co-founded our own plumbing business, which focused on new construction and remodeling work in Marin, Napa, and Sonoma Counties.”

Three years into their joint venture, Daniel and his brother decided to reorient their focus toward service and repair; little did they know it would completely change the face of their business. “We joined a plumbing organization that specialized in training owners how to run profitable service and repair businesses,” he explains. “Through this organization, we were introduced to Benjamin Franklin Plumbing—a brand concept one could license that included a ready-made logo and everything. I liked the concept and decided to sign up. Once we began advertising as Benjamin Franklin Plumbing, things really took off. Our business exploded, and within three years, our staff had quadrupled in size. Ten years later, we have almost 100 employees and three different locations in the Bay Area.”

Today, Daniel looks back with pride upon his accomplishments of the past decade. “I never really intended to build such a big business—I was more interested in being able to write my own story. Still, I feel proud of the things we’ve accomplished as a company. We kind of pioneered, at least in the Sonoma-Marin area, the way plumbers are perceived by creating a cleaner, more professional presentation. I’m also proud of the fact that we provide our employees with good wages and full benefits so they can live comfortably and take care of their families.”

A resident of Fairfax (where he lives with his wife, Ann), Daniel spends his time outside of work engaged in a variety of active pastimes. “Ann and I love getting out into nature and going hiking at local national parks. We also love to travel—we take about three major trips each year. We were recently in Bali, where Ann hosted a retreat that she put together, and afterward we visited her daughter in New Zealand. We both have family outside of the country, so we have plenty of reasons to travel.”

In regard to a professional philosophy, Daniel believes that having happy employees translates to having happy customers. “We’ve discovered the best way to ensure our customers stay satisfied is to put our employees first,” he explains. “When your employees are happy, they’re more invested in doing good work and treating customers right, and when that happens, everyone wins.”

When asked the first thing he’d do if he were to retire tomorrow, Daniel says he’d embark on a Greener lifestyle. “I would probably buy a property somewhere with lots of nature around it, build a self-sustainable home and plant an organic garden. I think it would be a very peaceful and rewarding lifestyle—to live in harmony with the Earth.”

Ask Me Anything!

Q: What’s your favorite style of music?

A: World music, especially Latin-based.

Q: What’s your favorite snack?

A: I like to eat healthy, so I prefer things like wild berries and raw veggies.

Q: If you could travel anywhere in the world, where would you go?

A: I’d like to spend some time in Southeast Asia and visit Myanmar, Vietnam, Cambodia, and Laos. I’m attracted to the culture and history there, including all the old temples and artifacts.

Q: What’s your favorite thing to do on a rainy day?

A: Do some cooking and watch a good movie.

Q: Are you an early bird or a night owl?

A: Both. I usually wake up early during the week, but I like staying up late on the weekends.


Read more

DIY Water Heater Maintenance


NOVATO — A crucial aspect of plumbing system maintenance is to drain your water heater’s tank at least once a year. This is important because of all the sediment in the water, which tends to collect and sit at the bottom of… Read more

Expert Video Tip

Video: How to Flush a Water Heater

Complete Video Transcription:

NOVATO — Host, Sarah Rutan: The simplest way to increase your water heater’s operating lifespan is to flush its tank annually. Today we’re in Novato with Diamond Certified… Read more




  • Kohler

  • Moen

  • Delta

  • Grohe

  • Sterling

  • American Standard

  • TracPipe

  • Badger

Duravit Plumbing
Franke Fixtures
Kallista Fixtures
Moen Plumbing Products
Delta Fixtures
Danze Fixtures
Porcher Plumbing Products
Crane Plumbing Fixtures
Ginger Bath Fixtures
Kohler Plumbing
American Standard Plumbing
Pegasus Plumbing
Toto Plumbing Fixtures
Gerber Fixtures
Hansgrohe Plumbing
Eljer Plumbing Products
Jado Bathroom Fixtures
Grohe Plumbing Fixtures
Rohl Plumbing Products
Elkay Plumbing Fixtures
Price Pfister Fixtures
Blanco Plumbing Fixtures
KWC Plumbing Fixtures
Sterling Plumbing
Bates & Bates Plumbing

wholesale bathroom fixtures
commercial bathroom fixtures
emergency plumbing
gas plumbing
green plumbing services
kitchen & bath faucets
water plumbing pipes
home plumbing installation
plumbing repairs
bathroom plumbing installation & repair
copper plumbing pipes
all plumbing services
new sinks
new kitchen faucets
new bathroom faucets
new shower faucets
replace shower plumbing fittings
plumbing help
affordable plumbing repairs
plumbing accessories
bathroom fixtures
kitchen fixtures
shower plumbing fixtures
home plumbing supplies
plumbing parts

Bel Marin Keys
Belvedere Tiburon
Black Point
Corte Madera
Dillon Beach
Forest Knolls
Kent Woodlands
Lucas Valley
Marin City
Mill Valley
Mission Rafael
Muir Beach
Muir Woods
Point Reyes Station
San Anselmo
San Geronimo
San Marin
San Quentin
San Rafael
Santa Venetia
Sleepy Hollow
Stinson Beach
Strawberry Point
Tamalpais Valley
Terra Linda


Contractors State Licensing Board (http://www.cslb.ca.gov/)
Associated Builders and Contractors (http://www.abc.org/)
Plumbing-Heating-Cooling Contractors Association (http://www.phccweb.org/)
American Backflow Prevention Association (http://www.abpa.org/)…

Contractors State Licensing Board (http://www.cslb.ca.gov/)
Associated Builders and Contractors (http://www.abc.org/)
Plumbing-Heating-Cooling Contractors Association (http://www.phccweb.org/)
American Backflow Prevention Association (http://www.abpa.org/)
American Society of Plumbing Engineers (http://www.aspe.org/)

American Water Works Association (http://www.awwa.org/)
California-Nevada Section American Water Works Association (http://www.ca-nv-awwa.org/)
California Water Association (http://www.calwaterassn.com/)
California Department of Consumer Affairs (www.dca.ca.gov)
North Coast Builders Exchange (http://www.ncbeonline.com/)
The United Association of Plumbers and Pipefitters (http://www.ua.org/)
World Plumbing Council (http://www.worldplumbing.org/)

Know What You Want
Establish What Plumbing Services You Need and Want from Marin County Plumbers

Plumbers in Marin County perform various plumbing tasks, so it’s important that you know what you need from a plumbing contractor before you pick up the phone. By having a clear idea of the type and scope of project, you’re more likely to find a good plumber that has the skills and experience to complete your job. Here are some sample questions to get you started.

  • Do I want a Diamond Certified plumbing contractor?
  • What do I need from a local plumbing company (emergency plumbing repairs, plumbing services, new construction plumbing installation, new plumbing fixtures, etc.)?
  • What is my budget for the plumbing work or plumbing repairs?
  • If I need new plumbing fixtures, is there a specific style or brands I’m looking for (i.e. Toto plumbing fixtures, Kohler plumbing products, modern plumbing supplies, traditional fixtures, contemporary plumbing fixtures)?
  • Do I plan to live in my home long-term or is this a rental property or home I plan to sell?
  • What characteristics and professional qualities do I want in a Marin County plumber? These may include promptness, reliability, good communication skills, and follow-up services.
Read moreRead less
What To Ask In Person
Questions to Ask When You Meet with Good Plumbers in Person

Your plumber should be willing to answer a few more questions before he or she begins working on your plumbing. Sample questions that you may want to ask include:

  • How much time will the job take, from ordering the new plumbing fixtures through installation?
  • Will I be able to stay in my home during the plumbing work? Or will the water be shut off for too long to comfortably stay?
  • If applicable, do you have energy-saving plumbing fixtures and other plumbing products that can save me money in the long run?
  • Have you completed any similar recent projects in my area of Marin County?
  • Do you have a list of customer references I can call?
  • How do you finish the plumbing installations? Will you leave my bathroom or kitchen in the same or better condition than it was in before you started the work?
  • How would I handle future plumbing service issues? Are you responsible for warranty work if there’s ever a problem with my new plumbing fixtures or plumbing products?
  • What can I do to make the plumbing repair / installation process easier?
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  • What To Ask References
    Interview Previous Customers About Their Experiences with Marin County Plumbers

    It’s best to choose a Diamond Certified plumbers because all certified companies have passed an in-depth ratings process that most other companies can’t pass. If you want quality from a plumbing contractor in Marin County and the greater Bay Area, you can have confidence choosing a Diamond Certified company. Diamond Certified reports are available online for all certified companies. And you’ll never be fooled by fake reviews. That’s because all research is performed in live telephone interviews of actual customers.
    If you can’t find a Diamond Certified plumbing company within reach, you’ll have to do some research on your own. If you do, it’s wise to call some references provided by your plumber. Keep in mind, though, that references from your plumbing contractor are not equal in value to the large random sample of customers surveyed during the Diamond Certified ratings process. That’s because references given to customers from companies are cherry-picked instead of randomly selected from all their customers. So the plumbing contractors will likely give you a few customers to call that they know are satisfied.
    If you do call references on your own, specifically ask for a list of the company’s 10 most recent customers. This will help avoid them giving you the names of only customers they know were satisfied.

    1. Were you satisfied with the plumbing repair/plumbing installation/plumbing service from _(company name)_?
    2. What was the type and scope of job they did for you (emergency plumbing repairs, new construction plumbing installation, fixture replacement, etc.)?
    3. Did they complete the work on time?
    4. Did the plumbers keep you up-to-date on the status of your plumbing project?
    5. Were there unexpected costs associated with your plumbing repairs or plumbing installation? If so, what were they for and were they avoidable?
    6. If you live in a smaller Marin County town such as Lagunitas, Santa Venetia, Nicasio, Stinson Beach, Almonte, Dogtown, Point Reyes Station, Mission Rafael and Strawberry Point, did the plumbers charge extra to travel to your home?
    7. Did the plumbing contractors show up on time?
    8. Did they clean up after finishing the plumbing work?
    9. When you need new fixtures or plumbing repairs in the future, would you use this plumber again?
    10. Would you recommend their services to friends and family?
    Read moreRead less
  • Review Your Options
    Hire Good Plumbing Companies in Marin County Including Those in the Smaller Cities of Black Point, Forest Knolls, Terra Linda, Woodacre, Lucas Valley, San Quentin, Kentfield, Kent Woodlands and Bolinas

    The Diamond Certified symbol has been awarded to companies that scored Highest in Quality in an accurate ratings process.

    Whether you’re in need of plumbing repairs or you’re hiring a plumbing contractor to install new plumbing pipes and fixtures in your home, your choice in a plumber will dictate how smoothly the project goes and the quality of the work. Now that you’ve done the research, consider the following questions in order to decide on the best plumbing contractor for your needs.

    1. Can one or more of the plumbing companies meet your needs for plumbing services, plumbing supplies and materials, brands and installation requirements?
    2. Are the contractors knowledgeable about the plumbing repairs or the type of new plumbing installation you need? Can they tell you which plumbing products best suit your needs and why (i.e. copper piping, PVC pipes, Kohler plumbing fixtures, Toto plumbing fixtures, pipe snaking, drain rooter services, etc.)?
    3. Are the plumbing professionals sensitive to your budget? Can they offer various plumbing products and plumbing installations that match your resources? Most contractors will give you bids for good, better and best options that include choices of plumbing products, prices, brand names/manufacturers, warrantees and plumbing services.
    4. Will the contractors guarantee or warranty their work and fixtures in the event of a product failure or plumbing installation error? Do they put their guarantees in writing?
    Read moreRead less
  • How To Work With
    Encourage the Best Plumbers in Marin County to Bid on Your Job

    Some homeowners have found it’s a valuable resource to hire a plumber for a smaller project before signing a contract for a major plumbing repair or installation. Others like having a working relationship with a local plumbing contractor because it gives them the confidence to know who to call in a plumbing emergency and who they can trust for a large plumbing job.

    It’s important to know that some good plumbing contractors in Marin County are choosy about which jobs they accept. This is because bids take time and expense to prepare, and some of these local plumbers have been taken advantage of by unreasonable homeowners. How can you encourage the best plumbing contractors to be interested in your job?

    • Show the plumbers you interview that you’re interested in a good value, not just the lowest bid. Oftentimes, the first questions plumbing contractors hear from potential customers is about the cost of a job. You can show them you know what’s really important in a plumbing installation and repair by asking about quality products, knowledgeable installation and overall value.
    • Be honest if you’re interviewing a few plumbers, but assure each that you’re accepting bids from a few select companies, not dozens.
    • Interview and hire local plumbing companies in Marin County including the larger cities of San Rafael, San Anselmo, Novato, Mill Valley and Larkspur. Most plumbers like to work in the local area, since it allows them to provide more timely service. It also helps you weed out less reliable plumbing contractors who travel long distances and install discounted products at a cut-rate that local contractors may not be able to compete with price-wise.
    • Be upfront about your needs and desires for your plumbing repairs or new plumbing installation. The more you share with your plumbing contractor, the easier it is for them to give you a reliable bid, the right plumbing services, and the follow-up service you need.

    Sign a Contract that Protects You and Your Local Plumbing Contractor
    Congratulations! You’ve found a good plumbing company that meets all of your requirements. Whether you’ve chosen a plumber from the larger cities of San Rafael, Novato, Mill Valley, San Anselmo, Larkspur, Corte Madera, Tiburon, Sausalito, Fairfax and Ross or a smaller town, now is the time to request a contract for the work desired.

    The contract should include in detail the scope of the plumbing project, any items or services that are excluded, payment terms, the exact plumbing materials and products to be used and any warrantees and guarantees. Your plumber should be proud to install only the best plumbing products and materials. Often, especially with plumbing fixtures, you will recognize the brand names of the best manufacturers. You may pay more for these plumbing products initially, but installing quality plumbing materials can save you money in plumbing repairs and replacements in the future.

    Once your plumber has given you a contract, read it entirely and be sure you understand all the terms and exclusions before signing it. This contract will protect you and your property, as well as your local plumber. So never sign a blank or incomplete estimate. You may write in additional requests or verbal agreements you’ve come to with the plumbing company representative, including start and end dates, no-later-than clauses that stipulate the date by which all work must be completed, or any bonuses you want to offer for early completion.

    Read moreRead less
  • Be a Good Customer
    Simplify the Job for Your Marin County Plumbing Company

    One of the easiest ways to get the most out of your contract with a local plumbing contractor is to be organized. This way, you can save the plumber time and save yourself money. You can reduce the billable time by having a written list of specific items you want addressed and a list of questions or concerns you want to talk about with your plumbing contractor.

    If you have a leaky sink or under-counter pipe leak, move all household items from the area so the plumber doesn’t have to spend his or her time clearing a space in which to work.

    Keep children and pets away from the area where the plumbing contractor is working for their safety and the safety and convenience of the plumber.

    Ask your plumbing company representative if there is anything you can do to help speed the job along. They may have specific suggestions of steps you can take to aid the plumbing repairs or new plumbing fixture installation and to shorten the duration of the job.

    How Can You Be a Good Plumbing Company Customer?
    It’s your plumber’s responsibility install quality plumbing systems and fixtures using the best possible techniques. But you play a big part in the success of your plumbing repairs and installations, too. Here are a few simple steps you can take to be a good customer when hiring a Marin County plumber.

    • Be clear and upfront with the plumbing contractor. Let them know what you expect from the plumbing repairs and installation, the long-term outcome you’re expecting and specific ways the plumbing company can satisfy your expectations.
    • Remember, a smile goes a long way.
    • Before you hire a plumbing service, restate your expectations and goals, and reiterate to the plumbing company representative your understanding of the agreement. Most problems with local plumbers occur because of a breakdown in communication. By being clear about your expectations and theirs, you can avoid most conflicts.
    • Ask your plumbing contractor if you should call to check on the progress or if they will call you with updates.
    • Be sure your Marin County plumbing service representative has a phone number where they can reach you at all times. The plumbing work will move along more smoothly if your plumber can reach you for updates, questions or work authorizations.
    • Return calls promptly when your plumbing contractor contacts you.
    • Pay your contractor promptly.

    Why would you want to be a good customer for Marin County plumbers? Plumbers appreciate customers who are honest, straightforward and easy to work with. Your good customer behavior sets the tone from your end and creates an environment conducive to a good relationship. Things may go smoother and problems may be more easily resolved.

    Read moreRead less
Check The Work
Revisit the Invoice and the Completed Plumbing Work

When your plumber has completed the work and before they leave the premises, most good plumbing companies will give you a written invoice for the work done. This invoice usually includes the following:

  • The name, physical address and license number of the plumbing firm.
  • A complete list of all work performed.
  • An itemized list of all new plumbing fixtures, materials and replacement parts.
  • The total cost, including the amount due for labor and plumbing materials.
  • Any applicable warrantees or guarantees provided by the plumbing product manufacturers and the plumbing company.

It’s smart to compare the work that was actually done to the written invoice. Ask your plumbing company representative to accompany you on a walk through the job site and show you the plumbing repairs or new plumbing installations. Check the work completed against the invoice. During your walk-through, ask if there are any special instructions for operating your new plumbing fixtures and the best steps to take in maintaining them. If you have questions about what work was done or how the installation was completed, ask your plumber before he or she leaves the job site.

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Written Warranties
Ask for Written Proof of Warranties

Get proof of warranty coverage before your plumber moves forward with the plumbing services. Not all plumbers in Marin County back up their work and products with warranties, but get all warranty terms in writing if the plumbing company you’ve chosen does. Your written warranty should include:

  • The plumbing firm name, physical address and contractors license number.
  • What plumbing products and work are covered, including whether the contractor will replace or repair the plumbing or give you a refund if you have to place a warranty claim.
  • Your responsibility if you need warranty work (i.e., if you have to pay for labor when filing a claim for plumbing warranty work or pay a prorated amount).
  • Terms and limitations of the new plumbing or plumbing repair warranty.
  • If the plumbing warranty coverage is transferrable to the new owner if you sell your home.
  • Any exclusions to the warranty and guarantee coverage must be in writing.
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Top 10 Requests
Popular Plumbing Brands Available Through Marin County Plumbers

The following are the top 10 requested plumbing fixture brands installed by plumbing contractors within the following Marin County cities.

  1. Kohler Plumbing Supplies
  2. American Standard Fixtures
  3. Toto Toilets
  4. Delta Faucets & Fixtures
  5. Grohe Faucets
  6. Price Pfister Faucets
  7. Franke Plumbing Fixtures
  8. Elkay Kitchen Sinks
  9. Blanco Sinks & Faucets
  10. Danze Faucets & Plumbing

Common Plumbing Service Requests Performed by Local Plumbers in Marin County
Plumbing contractors in Marin County often are called to repair and install the following top 10 plumbing service requests. See the paragraphs below for the definition of each.

Rooter Services in Marin County
Rooter service, also referred to as plumbing snake service, is a drain-cleaning service that unclogs pipes, cuts tree roots out of sewer lines and clears home piping to allow for better plumbing drainage.

Toilet Repair
Toilet repairs in Marin County include tank repair, toilet leak repair, toilet flange repair, wax ring replacement, toilet bowl repair, toilet valve repairs, repairs for running toilets, toilet part replacements, toilet handle repairs, toilet seat repair and flush repair.

Pipe Cleaning/Drain Cleaning
Sometimes referred to as rooter services or sewer services, pipe cleaning and drain cleaning involves the complete cleaning of a home’s pipes and drains. This service is generally performed to unclog pipes and drains or to prevent drain and pipe clogs. Pipe cleaning snakes are often used to clean pipes and drains.

Bathroom Plumbing
Bathroom plumbing is the installation and repair of the pipes, drains, and plumbing fixtures unique to bathrooms. These may include sinks, showers, toilets, bidets, bathtubs and sewer lines.

Kitchen Plumbing
Kitchen plumbing is the repair and installation of kitchen plumbing fixtures such as sinks, garbage disposals and dishwashers, and the repair of any kitchen plumbing fixtures and supplies. Together with bathroom plumbing repairs, kitchen plumbing repairs make up the most common plumbing emergency repairs.

Commercial Plumbing
Commercial plumbing services in Marin County are those that deal with plumbing repairs and installations in commercial buildings, including stores, schools, offices, hospitals, libraries and warehouses. Commercial plumbing is often on a much larger scale than residential plumbing and may require a different set of tools, knowledge and skills. Commercial plumbers may also perform industrial plumbing services and plumbing for warehouses.

Plumbing & Heating Services
Some Corte Madera plumbers offer plumbing and heating services, since the two trades have so many facets in common. Many plumbing and heating contractors offer full-service plumbing and HVAC services including water heater installation and repair, plumbing system installation, solar water heating systems and plumbing and heating supplies.

Emergency Plumbing Service
Emergency plumbing services are any unscheduled plumbing repairs provided by a local plumber. These may include kitchen and bathroom plumbing leaks, clogged pipes, burst pipes, sewer line clogs, drain leaks, toilet repairs, and main water line repairs. Some Marin County plumbers offer 24-hour emergency plumbing repairs.

Plumbing Services
Plumbing services (which may include emergency plumbing services) are any type of plumbing installation or repair. Some local plumbers in Marin County including those in the larger cities of San Rafael, Novato, Mill Valley, San Anselmo, Larkspur, Corte Madera, Tiburon, Sausalito, Fairfax and Ross are known for commercial and industrial plumbing services, while others specialize in residential plumbing services.

New Plumbing Installations in Marin County
The installation of new plumbing systems most commonly occurs in new homes and other new construction, or as part of a remodel. However, new plumbing systems can be installed as part of extensive plumbing repairs. New plumbing installation generally involves installation of new plumbing pipes, drains, plumbing fixtures and plumbing materials.

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Glossary Of Terms
Glossary of Plumbing Terms for Clients of Marin County Plumbing Contractors


Below are plumbing glossary terms and descriptions that will help you navigate your way through your plumbing repairs and installation services in Marin County, including in the larger cities of Larkspur, Corte Madera, Novato, Tiburon, Sausalito, San Rafael, Mill Valley, San Anselmo, Fairfax and Ross.

access panel
An opening in the ceiling or wall near a plumbing fixture that allows plumbers to service the plumbing system or pipes.

Also known as: plumbing access panel, plumbing access

A device added to the open end of a faucet that mixes air with water. Aerating the water creates a more even flow of water. Faucet aerators are inexpensive to install and can help conserve water and make shower and faucet spray seem more full.

Also known as: low-flow aerators, aerator shower heads, aerating faucets, faucet aerators

backflow preventer
A backflow preventer is a device that stops wastewater and dangerous contaminants from flowing back into the drinkable water supply. Backflow preventers are often code requirements for sprinkler systems, hand-held showers, faucets with pullout spouts, and kitchen sink sprayers.

Also known as: wastewater backflow preventer, backflow prevention valve

bathroom plumbing
Any plumbing to bathroom fixtures, toilets, sinks, showers and bathroom piping is known as bathroom plumbing. Bathroom plumbing may be plumbing repairs, plumbing system installation or installation of new plumbing fixtures.

Also known as: bathroom fixtures, bathroom plumbing repair, shower plumbing, toilet plumbing repairs

commercial plumbing
Commercial plumbing is any plumbing repairs or installations that take place in a commercial building. Commercial plumbing is different than residential plumbing because it often deals with commercial-sized water heaters, boilers, larger piping and more involved plumbing systems. Some plumbing contractors in Marin County specialize in commercial plumbing while others focus on residential plumbing. A few plumbing companies will provide plumbing services and repairs for residential, commercial and industrial clients.

Also known as: commercial building plumbing services, industrial plumbing, multi-tenant building plumbing, store plumbing, shopping center plumbing

A pipe coupling is a fitting that connects two pieces of pipe. Common couplings for piping and plumbing include elbow fittings, tee fittings, cross couplings, cap couplings, plug fittings, nipple couplings, barb fittings and pipe reducer couplings. Plumbing system fittings can include closet flange couplings, trap primer couplings, clean-out fittings, combo-tee fittings, sanitary tee and double sanitary tee couplings, sanitary cross fittings and wye fittings.

Also known as: pipe couplings, couplings, fittings, pipe valves, PVC couplings, CPVC couplings

drain cleaning
Drain cleaning is a method of clearing organic debris and other materials from plumbing, drains and pipes. Drain cleaning for residential structures and commercial buildings includes drain pressure washing, drain snaking, drain cleaning chemicals, clearing clogged drains, drain tree root clearing and pipe degreasing services.

Also known as: clog removal, degreasing, pipe cleaning, drain clearing, unclogging, clean drainage pipes

An elbow is a pipe fitting that has two openings and which changes the direction of the plumbing line. Pipe elbows come in a variety of degrees to account for the various angles of piping.

Also known as: el fitting, ell coupling, pipe elbow, plumbing elbow, plumbing ell

Fittings usually refer to faucets, shower valves, and tub fillers. Fittings may also refer to piping coupling such as elbow fittings, tee fittings and flange fittings.

Also known as: plumbing fitting, fitting, pipe coupling

In plumbing, fixtures are the objects that water comes from. Plumbing fixtures include water spigots and faucets, shower, sinks, toilets, urinals, and external plumbing system fixtures.

Also known as: fixtures, faucets, kitchen fixtures, bathroom fixtures, plumbing fixtures

GPM, or gallons per minute, is the rate of water flow from faucets and shower heads. GPM flow is regulated by the federal government. New showerhead flow rates can’t exceed 2.5 GMP and new faucet water flow rates can’t exceed 2.5 GPM or 2.2 GPM depending on the pressure. Installing low-flow faucets and fixtures can result in water savings between 25 and 60 percent without a noticeable change in water pressure.

Also known as: gallons per minute, flow rate

GPF, or gallons per flush, is the amount of water a toilet uses per flush. The rate of water flow by which toilets and flush valves are measured and regulated. Current law requires maximum of 1.6 GPF. Older styles were usually 3.5 GPF.

Also known as: gallons per flush, flush flow rate, flush capacity

ID is the abbreviation for “inside diameter,” which refers to the size of the diameter of a plumbing pipe when measured from the inside edges. All pipes are referred to according to their ID.

Also known as: inside diameter

kitchen plumbing
All plumbing and plumbing fixtures in a kitchen are referred to as kitchen plumbing. Kitchen plumbing systems often include sinks and faucets, dishwashers, garbage disposals, sink plumbing, kitchen piping, sink drains, S-traps, slip joints, drain lines and supply line water pipes.

Also known as: kitchen fixtures, kitchen pipes, kitchen plumbing repair, kitchen plumbing installation

new plumbing installation
New plumbing installation refers to the installation of new plumbing lines, water pipes, drain lines, faucets and plumbing fixtures. New plumbing may be installed in new construction or in existing homes.

Also known as: plumbing installation, commercial plumbing installation, residential plumbing installation, industrial plumbing installation, plumbing replacement, plumbing reinstallation

The abbreviation for outside diameter, OD, refers to the dimension commonly used to size water pipes and tubing for plumbing.

Also known as: outside diameter

PVC pipes
PVC, or polyvinyl chloride, is a hard white or cream-colored plastic that is used to form plumbing pipes. PVC pipes are often used in venting and waste water systems that are not pressurized. PVC will melt if exposed to hot temperatures, so PVC pipes are used for cold water distribution.

Also known as: polyvinyl chloride, PVC piping

rooter service
Rooter service is a drain-cleaning service that unclogs pipes, cuts tree roots out of sewer lines and clears home piping to allow for better plumbing drainage.

Also known as: plumber’s snake, drain snaking, drain rootering, drain rooting, pipe rooter service, pipe snaking

The rough-in is the initial part of a plumbing installation that lays out all the basic plumbing lines without permanently connecting them. The rough-in generally includes water supply lines, water drains, water waste and vent lines that run to each fixture (toilet, sink, shower, etc.). Roughing in is generally done before the plumbing inspection.

Also known as: roughing in, to rough in, roughing

toilet repair
Some toilet repairs can be simple enough for some homeowners to handle themselves, or they may require a plumber to fix them. The most common toilet repairs include a toilet running continuously, a loose toilet handle or a sticking toilet handle, water on the floor around the toilet, leaking toilet tanks, poorly flushing toilets, clogged toilets, noisy toilets and toilet tank repairs.

Also known as: toilet problems, toilet problem repairs, toilet part replacement, toilet tank repairs, toilet unclogging, fixing the toilet


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Frequently Asked Questions
Frequently Asked Questions About Plumbing Services in Marin County

Read on to find the answers to the most commonly asked of and about plumbing contractors.

Q: Why choose Diamond Certified Plumbers in the Marin Area?
A: Diamond Certified helps you choose a plumbing company with confidence by offering a list of top-rated local companies who have passed the country’s most in-depth rating process. Only plumbers rated Highest in Quality earn the prestigious Diamond Certified award. Most companies can’t pass the ratings. American Ratings Corporation also monitors every Diamond Certified company with in-depth and ongoing research and ratings. And your purchase is backed by the Diamond Certified Performance Guarantee. So you’ll feel confident choosing a Diamond Certified plumbing contractor.

Q: Why won’t some plumbers in Marin County give estimates over the phone?
A: Many good plumbers won’t give estimates over the phone because it can be hard or impossible to accurately diagnose a plumbing problem without seeing it first-hand. Since plumbing fixtures and materials greatly vary, plumbing contractors who give estimates over the phone may end up changing the diagnosis and the fee after arrive on the site to repair the problem or install the fixtures.

However, many plumbers will give free estimates when they come to look at the plumbing problem in person. Others may charge for estimates but might apply the fee toward your repair costs if you hire them to do the plumbing repairs.

Q: Is it an advantage to hire a Marin County plumber who carries parts and equipment in their work trucks?
A: It can be an advantage to hire plumbing companies who has a well-stocked work truck. These prepared plumbers can usually repair common plumbing problems faster because they have with them all the materials required, rather than having to drive to a plumbing supply store.

Q: My plumber wants me to sign a Waiver of Right to Cancel for my emergency plumbing repairs. What is this and is it legal?
A: In the state of California, consumers who sign a contract with a company that comes to their home to provide a service or product have three days to cancel the transaction. However, while that might be a protection for the consumer in some cases, it can cost plumbers thousands of dollars if a consumer decides to cancel the contract after an emergency plumbing service has been rendered. That’s because unlike products, consumers can’t return services, so if a customer cancels the transaction, the plumber will have, in essence, don all the work for free.

For that reason, some plumbers ask emergency plumbing customers to sign a Waiver of Right to Cancel, meaning that they accept and will pay the charges for the emergency plumbing repairs. Asking a customer to sign this waiver is legal, but only if the repairs are for a true emergency. To protect yourself from plumbers who try to take advantage of customers by asking them to sign a waiver in a non-emergency situation, make sure the repairs you’re having done are truly required immediately.

Q: How can I prevent drain clogs?
A: Frequently hiring a plumber to unclog your drains can get to be expensive. If you find yourself regularly calling your plumber to fix clogged drains, there are some simple solutions that can help you avoid trouble in the future.

  • First, find out what type of pipes you have. Older pipes such as iron pipes or galvanized pipes can rust and clog more easily. You may choose to hire a local plumbing company to repipe your home using copper or PVC pipes, which are less likely to clog and will not rust.
  • Install stoppers and hair traps on all your sinks and bathtubs.
  • Do not pour cooking grease or other liquids down your sinks that may solidify when cool.
  • Regularly flush sinks and bathtubs with running water.
  • Remove hair and other debris from sink stoppers before it can be flushed down the drains.
  • Never use your toilet as a garbage disposal or flush baby wipes or paper towels.

Q: We rarely use our guest bathroom. Is there anything we should do to keep the plumbing and fixtures working?
A: Toilets, piping and fixtures should be regularly flushed with water. This keeps the water traps full and avoids the backflow of odors and gasses into the home. Once a week, you should use or turn on the fixtures to keep them functioning. You can also pour a bucket of water in each toilet, sink, shower and floor drain in the unused bathrooms in your home.

Q: What are on-demand water heaters?
A: On-demand water heaters, also called tankless water heaters, heat water as you use it rather than heating and storing hot water in a tank. Because tankless water heaters don’t waste energy storing and maintaining the temperature of unneeded hot water, their operating costs can be up to 30 percent lower than those of a traditional water heater. And with the emphasis on energy-saving appliances, tax credits may be available to consumers purchasing an on-demand water heater.

Q: Should I buy a low-flow showerhead or low-flush toilet? Why?
A: Low-flow plumbing fixtures like low-flow toilets and low-flow showerheads save substantial amounts of water over traditional showerheads and toilets. This saves water, energy and expense. Numerous water-saving fixtures have been available since the National Energy Policy Act that mandated low-flow toilets was passed in 1995. While some consumers complained that early models of low-water fixtures had weak pressure and didn’t work as well as the standard fixtures, modern.

Q: What other water saving and energy saving plumbing fixtures are available in Marin County?
A: These days, there are many options for energy-saving plumbing fixtures, or green plumbing solutions. Some include air-assisted toilets, gravity toilets, power-assisted toilets, aerators, green plumbing fixtures, tankless water heaters, gray water recycling fixtures, composting toilets, dual-flush toilets, waterless urinals, sensor-operated faucets, solar water heaters, hot water re-circulating pumps and many others. Call your local plumbing contractor in Marin County for more information on available water-saving plumbing products and which ones will work best for you.

Q: My drains are running slow. Can’t I just use a Liquid Plumber-type drain cleaner?
A: You may be able to fix clogged drains and stopped up sinks by using drain-cleaning chemicals you buy at the store or a non-toxic baking soda drain cleaner. However, for tough clogs that you can’t clear after a few attempts or drains and pipes that clog constantly, you may need to call a Marin County plumbing company to professionally remove the clog or snake out your pipes and drains to keep clogs from forming in the future.

Q: I think tree roots may be growing in our pipes. What should I do?
A: First, have a good plumber confirm that you have roots in your piping. Some plumbers in Marin County have camera equipment that can prove where the problem is, that it is roots growing in the pipes, and can give them a view of how to repair the problem. They can also advise you on the best method to prevent the problem. This may entail removing the bushes or trees that are growing into the piping, using a root-killing product, replacing the affected pipe with a stronger material, or snaking out the pipe or using high-pressure water to jet out the pipe and line it with an epoxy material.

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