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

  • Why this rating is the most accurate.
  • Our editors gather deep company info.
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Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified Drainage Companies Rated Highest in Quality?

Photo: Devengenzo Landscaping & General Engineering Inc. (2013)

CONCORD—You are the customer. If your goal is to choose a drainage company that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified drainage 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 drainage 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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Robert Devengenzo is president of Devengenzo Landscaping & General Engineering Inc., a Diamond Certified company since 2013. He can be reached at (925) 405-6912 or byemail.

Robert Devengenzo

diamond certified contributor profile and expert article

Robert Devengenzo: Full Circle

By James Florence, Diamond Certified Resource Reporter

LAFAYETTE — After getting an early education in the construction field, Robert Devengenzo decided to switch gears and start a gardening business. However, as his business grew, he found himself incorporating more and more of his previous experience…until he eventually came full circle. “My dad built two or three of his own homes during his lifetime, and from the time I was 10 years old, he had me working alongside him,” he remembers. “After high school, I got into landscaping and ended up starting a gardening business with my wife, Marilyn. During the next few years, I acquired my landscape contractor’s license and brought on a few employees. It continued to grow from there—the more experience I had, the bigger the jobs became. It wasn’t long before I branched out from gardening and landscaping to doing drainage systems and general construction.”

Today, as owner of Devengenzo Landscaping and Engineering Inc., Robert continues to maintain a hands-on involvement with his company’s operations. “I enjoy meeting new clients, doing estimates and presenting our company to them. I also like to be out in the field, running crews and overseeing things. After all these years, those are still the aspects of the job I enjoy the most.”

Robert resides in Walnut Creek, which he considers an ideal location for someone in his line of work. “Between the affluent economy and the prevalence of older homes, there’s plenty of demand for our services in Contra Costa County. A lot of our work comes from homeowners who buy older homes and don’t know they have drainage issues. Also, with all the hills around here, there are a lot of challenges, which keeps things interesting.”

Outside of work, Robert enjoys spending time with his large family. “Marilyn and I have five kids, several of whom have worked for our business,” he says. “My oldest son worked for me for 12 years and is now a general engineering contractor, and my youngest is currently our lead carpenter. We also have 14 grandkids, ranging from age three to 25. Basically, there’s never a dull moment!”

In his life and career, Robert believes in doing things a certain way: the right way. “The main thing I believe, and the thing I impart to my employees, is if you’re going to do something, you have to do it right or not at all,” he affirms. “Other than my kids, I’ve had three guys who’ve worked for me in the past, and I schooled them well enough that they could get their licenses and be successful on their own. I take a lot of pride in that.”

When asked the first thing he’d do if he were to retire tomorrow, Robert says he’d transition to a more rural mode of life. “Marilyn and I did farming for about 14 years and enjoyed it very much, so I’d love to get back to doing that. We’d also like to do some more traveling—it’s been a long time since we’ve been out of the country.”

Ask Me Anything!

Q: If you could travel anywhere in the world, where would you go?
A: Italy, because that’s where my family heritage is based.

Q: What’s your favorite restaurant?
A: I have two: Il Fornaio and Fleming’s Prime Steakhouse & Wine Bar, both of which are in Walnut Creek.

Q: What’s your favorite holiday?
A: Christmas. In addition to my wife’s baking, I look forward to all the kids and grandkids coming over.

Q: If you could time travel, would you go to the past or the future?
A: The past. I love history, and I’ve always wanted to live in the Old West.

Q: Who’s your favorite movie cowboy?
A: Clint Eastwood.

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Understanding Two-Pipe Drainage Systems


LAFAYETTE — While often overlooked, drainage is nonetheless a vital functional aspect of any home. There are a few different ways to go about achieving proper drainage, but the most common method is installing a “two-pipe system.” A two-pipe drainage system… Read more

Expert Video Tip

Video: Understanding your Drainage System

Complete Video Transcription:

LAFAYETTE — Host, Sarah Rutan: When having a new drainage system installed on your property, it’s worthwhile to get an idea of how it functions. Today we’re… Read more




  • Cemex

  • Curecrete

slot drains
land drains
soakaway drains
fin drains
dispersal drains
collector drains
linear drainage systems
French drains
land grading
dry creeks
trench drains

foundation drainage system installation
drainage system repairs
storm drainage system solutions
sustainable drainage system solutions
underground drainage system installation
yard drainage system installation
residential drainage services
commercial drainage services
land drainage installation
rainwater drainage
surface drainage & grading

Bay Point
Bethel Island
Discovery Bay
El Cerrito
El Sobrante
Hilltop Mall
Los Medanos
North Richmond
Pleasant Hill
Point Richmond
Port Chicago
Port Costa
Rheem Valley
San Pablo
San Ramon
Tara Hills
Vine Hill
Walnut Creek
Walnut Heights
West Pittsburg


The following agencies and associations will have more information about home drainage solutions, local drainage companies and finding and installing the best water drainage systems for your property.

Association of California Water Agencies (http://www.acwa.com/)
California Stormwater Quality Association (http://www.casqa.org/)

Plastics Pipe Institute (http://plasticpipe.org/)
US Society of Irrigation and Drainage Professionals (http://uscid.org/)

Know What You Want
Consider Your Needs Before Calling Contra Costa County Drainage Experts

Before you start looking for a drainage contractor in Contra Costa County, think about some specific drainage system questions you may have.

Get some thoughts down on paper. Maybe you are mostly concerned with the drain system cost, or the quality of the water drainage services. You may want someone to take extra time explaining drainage system options so you’re sure to get the one that best suits your needs.

Being precise about your drain system needs will help you measure the responses of water drainage providers, so don’t take this step lightly. Instead, take some time to think about your needs and wants.

Here are some sample questions about drainage systems that you should ask yourself before looking for a drainage company:

  • Do I want a Diamond Certified drain system company that is rated Hightest in Quality and is backed by the Diamond Certified Guarantee?
  • What type of drainage problems am I currently experiencing in my home or business?
  • What kind of drainage services do I need—a new drainage system installation, drainage repairs or a consultation about the drainage system my home or property requires?
  • What personal and professional traits are most important to me in a drainage contractor? (For example: timely, honest, caring, knowledgable, skilled in installation and repair, offer a good warranty on their work and products, etc.)
  • Do I want a drainage contractor that has an outstanding reputation with Contra Costa County drain service customers?
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What To Ask In Person
Interview Good Drainage Contractors in Person

Once you’ve interviewed local drainage experts, a few companies will likely stand out as the better ones from which to choose. Use the notes you’ve taken and the impressions you’ve formed during your telephone interviews to select three drainage contractors to interview in person.

Invite them to your business or home so they can see the existing drainage system (if any), the drainage problems you’re having and the location in which the work will be done.

This will enable them to ask you questions, see the location and the current state of your drainage system so they can give you a more accurate estimate for drainage services.

While the drainage contractors are at your location, take advantage of the chance to ask them a few final questions to factor into your decision. Again, write down their answers so you will be able to use those answers together with the bids to help you make a final choice on the best drainage comany for you.

Questions like the following may help you judge local drainage system providers:

  • Can you repair the drainage system we currently have? Why or why not?
  • What type of drainage system do you recommend for our home or business? Why?
  • What are the pros and cons of installing that particular type of water drainage system?
  • What is a new drainage system likely to cost, and what could cause actual expenses to be less than or greater than expected?
  • How likely is it that the new drain system installation or repairs will go through without additional costs or delays?
  • What exactly will take place in the anticipated drainage service process?
  • How will you be in contact with us during the drainage work?
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  • What To Ask References
    Interview Customers of Local Drainage Companies

    Have the water drainage companies you’ve interviewed really satisfied their past customers?

    That’s a very important factor to know about the drainage companies you’re considering hiring.

    Getting a trustworthy answer to that question requires reliable, independent information on the drainage contractors and their past performance.  Diamond Certified gives drainage system customers a big advantage. That’s becuase you can be sure Diamond Certified drainage companies have a record of customer service and high quality perofmance.

    Hundreds of telephone surveys of actual customers give you the opportunity to read word-for-word reviews given by randomly-chosen drain system customers in Contra Costa County. You won’t get misleading customer satisfaction information on drainage systems, because you’ll have the researched experience of many drain system customers. And you will have the Diamond Certified Performance Guarantee on your drainage system purchase.

    If you can’t choose a Diamond Certified water drainage company, you’ll want to carefully check out  drainage system companies yourself. But be wary. Drainage companies may give you the names and phone numbers of customers you can talk to. But that’s not like the reviews of drainage system customers from the Diamond Certified ratings process. That’s because water drainage companies may just give you customers with good experiences and keep you away from those that have had trouble with the drain system company.

    If you do call non-Diamond Certified drain system customers, get some recent customers (to avoid the drainage system company selecting only satisfied people). Ask a few general questions about the water drainage company and some specific questions about the drain system process.

    Questions about drainage system contractors could include these:

    • What drain system work did you have done, and what did it cost?
    • Did you feel good about the overall drainage system work process?
    • Were you okay with the time it took to have the water drainage work done?
    • Were there any unpleasant surprises in the drain system work process?
    • Did the drain system contact person treat you well and explain things fully?
    • Was the drain system cost reasonable, and close to the water drainage cost you had expected?
    • What parts of the drainage system process were done particularly well by the drain system company?
    • Would you go back to the water drainage company?
    • Do you recommend this drain system company?
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  • Review Your Options
    Hire a Trustworthy Drainage System Company in Contra Costa County

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

    You have a lot of information that will help you make an educated choice on the best water drainage contractor for you. But before you make your final decision, think about these issues for drainage system services:

    • Can the drain system company you’re looking at in Contra Costa County do the really important things, providing high-quality, courteous, and reasonably priced drainage system service?
    • Will the drainage system provider give you precise information and treat you fairly?
    • Is the drain system contractor rated highly by water drainage customers in Contra Costa County?

    Sign a Contract With a Good Drainage Company in Contra Costa County or the Greater Bay Area
    A final question in choosing a drain system company in Contra Costa County could be this one: Do you have good evidence to believe the drain system provider will meet your specific needs for the water drainage work process?

    Keep in mind the value of reading random customer satisfaction info available for prequalified and guaranteed Diamond Certified drain system companies.

    Once you can answer this question positively, you can confidently move ahead by signing a formal contract with the drainage company of your choice.

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  • How To Work With
    Working with Local Drainage Contractors in Concord, Richmond and Beyond

    California drainage system contractors are all licensed by the Contractor State License Board, but you want to know whether the drainage provider you choose will be the best fit for your water drainage work process.

    All Diamond Certified drainage companies have been checked in advance for high quality, in such areas as high customer approval ratings, customer-friendly practices, and customer-satisfaction principles.  If you can’t choose a Diamond Certified drainage company in Contra Costa County, you should search carefully yourself for a water drainage contractor that will truly meet your drainage system needs.

    Drain system companies in the larger Contra Costa County cities of Pittsburg, Concord, Antioch, Walnut Creek and Richmond often serve customers outside of their immediate area, so be sure to ask how far your contractor will travel.

    Get Accurate Information on Drainage Services in Contra Costa County
    Be sure you understand the drain system cost you are considering, and the details of the drainage system financing if any.

    You should be comfortable with the drain system your contractor is suggesting and understand why he or she recommends that specific drainage system, drainage services or drainage repairs.

    If you don’t understand the services, materials or products your drainage contractor recommends, ask for further information and make notes on the responses.

    Ways to Make the Water Drainage System Installation Easier
    Remember to read the drain system estimate or contract carefully to find out exactly what the drainage system will cost, including the total with any financing costs added.

    At this point, ask your water drainage contractor what you can do to make the job go more smoothly. This may include preparing the job site by removing lawn furniture or decorations, keeping children and pets out of the area, providing parking space for work vehicles, allowing for temporary storage room for the drainage system components or other materials.

    It is possible to help the job go faster, more smoothly and even potentially cost less by easing the job of your drainage contractor. So it may be well worth your time and effort to pitch in and do your part.

    Sign an Estimate or Sales Contract with a Drainage System Contractor in Contra Costa County,
    Once you’ve chosen a drainage contractor and are comfortable signing a contract for their services, review the drain company’s agreement or contract.

    Take plenty of time to read the drainage system estimate or contract carefully, looking particularly for anything extra or unusual you may have agreed upon with the water drainage company. Ensure that all verbal agreements are in writing and included in the contract. You are allowed to write in additional requests or verbal agreements.

    When you’re satisfied with the drainage system estimate or cost, and any financing with the Contra Costa County drainage contractor, sign the agreement for water drainage services.

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  • Be a Good Customer
    Benefit By Being A Good Customer

    Good drain system services in Contra Costa County are the responsibility of drainage system contractors.  But you also can play a part in the quality of water drainage services you receive.

    Consider these ideas:

    •     Be simple and direct with the drain system company.
    •     Be friendly and polite with the drainage system providers.
    •     Ask questions upfront, and do what you can to simplify the job for your contractors.
    •     Keep children, pets and others away from the work site to prevent injury and damage to the worksite.
    •     Ask your contractor if you need to make room for work vehicles or other machinery while your new residential drainage system is being installed.

    It works for you and for your drainage contractor when you take the time to be a good customer.

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Check The Work
Verify All Drainage Services Were Completed to Your Specifications

Before the Contra Costa County drainage contractor you’ve hired leaves the premises for the final time, ask them to walk you through the job that they’ve done and explain the completed drainage services.

Take this opportunity to make sure everything about the new drain system they’ve installed is as you expected. The contract you signed should include specific item numbers, materials and system specifications that will help you know you’ve gotten the exact product and system you were hiring the contractor to provide.

If you have any questions about your drainage system repairs or new drainage system, the components, maintenance or any other items, make sure to ask now. Your residential drainage contractor should be willing to answer your questions and give you any additional information you need to know.

It will be easiest to wrap up the final details now, before the project is completed and the final payments are made.

Finally, verify any routine maintenance or care tips the contractors have for your new water drainage system. You should also verify that you have phone numbers and any other contact information you may need for contacting the drainage contractor in the future with questions, repairs, maintenance or for warranty information.

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Written Warranties
Get Warranties from Contra Costa County Drainage Contractors

Confirm any warranties with your drainage contractor before signing off on the completed job or remitting your final payment. Warranties are your protection against poor workmanship or product failure, so be sure you’re given written proof of warranties from both the drainage contractor and materials supplier (as applicable).

A written warranty document should include the following items:

  • The drain system contractor’s license number, contact information and physical address.
  • A detailed description of what’s covered by the drainage system warranty (i.e. parts and/or labor).
  • How your drainage contractor will back up their services and products (such as promising to perform drainage repairs, give you money back on the drainage system, replace failed parts, etc.).
  • Whether the warranty expires on a certain day (the date must be included in writing), after a certain amount of time (this should be explicitly stated) or if the warranty coverage is prorated based on the amount of time the water drainage system has been installed/since the repairs.
  • Instructions for taking action on the warranty.
  • The time period covered by the warranty.
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Top 10 Requests
Water Drainage Services Provided By Contra Costa County Drainage Companies

Drainage services in Contra Costa County serve different needs. Here are some common services provided by local drainage contractors.

Residential Drain Installation
Residential drains can prevent ponds from forming in your yard by providing a path for water drainage. The typical building code requires a minimum decrease in elevation of 6 inches over the ten feet next to your house. This may not be enough slope to keep water away from your foundation. One easy way to keep from having to regrade around your home is to use a French drain, also known as a trench drain. A French drain is made of 4-inch perforated drainage pipe laid about a foot and a half deep around your house, with a gravel bed and a layer of gravel on top. The French drain follows the slope of the yard until it gets past the house, where it levels out and seeks daylight.

Drainage Systems
The drainage system is the set of parts that allow water to drain properly out of the soil on a building site.  A good drainage system will use the right materials and be designed for adequate drainage volume and durability. Routine inspection and maintenance are also important to drainage system function. Common parts of a drainage system include drainage pipe, geotextiles for filtering soil out of the system, drainage pipe couplings, catchbasins and manholes for collecting water drainage, drainage pipe anchors, and drainage stone.

New Drain Pipe Installation
Drain pipe is a fundamental part of a drainage system. Plastic drain pipe is common because it is cheap and easy to use. Drain pipe may be flexible or rigid, and will differ by the thickness and shape of the drainage pipe walls. Flexible drain pipe has the disadvantage of allowing low points that could block water drainage. The cheapest drain pipe is thin and corrugated highly flexible drainage pipe, which can fail under the weight of construction machinery or soil, and may not allow good watertight drainage connections. Thicker corrugated pipe can improve drain pipe performance.

Drainage pipe is likely to be made of plastic, and manufactured from one of three materials: polyvinyl chloride (PVC), polyethelene (PE), or high-density polyethelene (HDPE). Plastic drain pipe may be rigid or coiled. Rigid drainage pipe is sold in shorter lengths and requires more connections but is stronger, while coiled drain pipe requires fewer connections but may cave in or buckle under pressure. Plastic drain pipe also comes in perforated or nonperforated (tightline) drainage varieties. Perforated drain pipe allows water drainage to enter through holes or slots, and can carry more water as the size of the perforations increase.

Drains for Swampy Yards
A drain will be especially important for property that has an underwater spring or sits in a low spot. Drains may be needed for land that has a lot of clay in the soil or has bedrock rather near the surface, which can cause water to drain sideways in the soil rather than moving downwards. A swampy yard under heavy rainfall is likely to require a drain to prevent water drainage from constantly entering the basement. Drain types include French drains, trench drains (another name for French drains), soakaway drains, and slot drains.

French Drains
A French drain, or trench drain as it is also known, is extremely useful and common for relieving drainage problems from a slope above your house or poor soil drainage because of dense subsoil with large amounts of clay. The French drain is a set of 4-inch or 6-inch perforated drain pipes parallel to the surface in gravel-lined trenches 2 feet deep in the high ground around the house. The trench drains become horizontal to open onto the surface of the slope around the house, giving soil water drainage a sort of gutter for moving rapidly past and away from your house.

Full Drain System Installation
A drain system can involve much more than drainage pipes. A drain system may include geotextiles, drain pipe couplings, drain pipe anchors, and drain gravel. Geotextiles are drainage fabrics that filter soil out of the water drainage to keep the drain pipes free. Drain pipe couplings are watertight joints between pieces of pipe, and common spots for drain system failure. Drain pipe anchors stabilize drain pipes against the enormous pressures resulting from water drainage moving downhill or around a bend. Drain gravel is free-draining material placed next to perforated drain pipe.

Downspout Water Drainage / Downspout Diverter Drains
Downspout drain pipes may not always be enough to keep water drainage off your roof from ending up in your basement. A storm may dump over a thousand gallons of water on your roof. To keep all of that drainage out of your basement, you may need to have underground downspout diverter drains placed. These drains will be a little over a foot deep, made of 4-inch rigid sewer pipe that is not extremely thick but not of the extremely flimsy drain pipe type. The drain pipe should not be buried in the noncompacted soil next to the foundation where the soil could could bend the drainage pipe.

Foundation Drainage Systems
Drainage of water toward your foundation is a fact of living with rainfall. Most homes are on a slope, a prescription for foundation drainage. And foundations are surrounded with backfill soil, which contains lots of air, which wants to fill with drainage water. To keep water drainage away from your foundation, you need to a good drain next to it. Drain tile installed next to the foundation footer provides a way for the water to drain properly.

Home Drainage Systems
Keeping the water drainage away from the foundation is not the work of a single part, but the result of a complete drainage system. A French drain, also known as a trench drain, made of perforated drainage pipe surrounded with gravel in a shallow trench can be a very important part of that drain system. The drain system should also protect the foundation by drain pipe methods for moving away water drainage from the roof, the driveways, and the patio. The foundation should also be protected by preventing plantings and mulch that could block drainage near the house, and perhaps by a tile drain at the footer.

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Glossary Of Terms
Glossary of Residential Drainage System Terms

Below are some drainage terms which may be of help in understanding drain systems and communicating with your local drainage contractor:

A chamber for trapping soil and other drainage material below the drain outflow point.

Also known as: drain, drains, drainage, drain system, water drainage, drainage system, drainage systems

A pathway to drain water drainage properly off of and out of the soil. Drains are most often installed by licensed drainage contractors who can measure the specific angles, depth and other job specifics to install the most effective drain system for the property.

Also known as: drain, drains, drainage, drain pipe, drain pipes, drain system, water drainage, drainage pipe, drainage system, drainage systems, French drain, trench drain, soakaway drain

drain system
A set of channels, drains, ditches and similar runoff pathways for carrying water drainage off the surface and out of the soil.

Also known as: drain, drains, drainage systems, drainage, drain pipe, drainage pipe, drain pipes, drain system, water drainage, drainage system, French drain, trench drain, soakaway drain

The total process by which water drainage flows off the surface and drains out of the ground to reach streams, rivers, and man-made drains.

Also known as: drains, drainage, drain, drain pipe, drain pipes, drain system, water drainage, drainage pipe, drainage system, drainage systems, soakaway drain, French drain, trench drain

drainage ditch
An open man-made drain designed to carry water drainage from the surface or the soil.

Also known as: drain, drains, drainage, drain system, drainage system, water drainage, drainage pipe, drainage systems

drainage system
A residential design made to drain away surface water and groundwater drainage through such devices as downspout diverter drains, French drains, and trench drains.

Also known as: drain, drainage, drain pipe, drain pipes, drains, drain system, water drainage, drainage pipe, trench drain, drainage system, drainage systems, French drain, soakaway drain

A drainage slope, particularly the minimum required drainage slope of 6 inches in 10 feet to drain the ground around your house.

Also known as: drainage systems, drainage, drain system, water drainage, drainage system

open drain
A ditch or surface channel drain for water drainage.

Also known as: drain, drainage systems, drains, drainage, water drainage, drainage pipe, drainage system, drain system,

plastic drain pipe
Drainage pipe made of polyvinyl chloride (PVC), or drain pipes made of polyethylene (PE) or high-density polyethylene (HDPE).

Also known as: drain, drains, drain system, drainage, drain pipes, water drainage, drainage pipe, drainage system, drainage systems, French drain, drain pipe, trench drain, soakaway drain

Related to the banks of river or stream water drainage.

Also known as: drainage, water drainage, drainage system, drainage systems

Water drainage that doesn’t drain into the soil, but runs along a surface or through a drain pipe.

Also known as: water drainage, drain, drains, drainage, drain pipe, drain system, drainage pipe, drainage system, drainage systems, drain pipes

Settling out of soil or other suspended material in a drain pipe or elsewhere within a drainage system.

Also known as: drains, drainage, water drainage, drain, drainage system, drainage systems

A drain pit for surface water drainage to be absorbed into the earth.

Also known as: drain, drains, drainage, drain system, water drainage,drainage systems, soakaway drain

subsurface drain (SSD)
An underground pervious drain pipe for collecting water drainage from the soil, such as a French drain or trench drain.

Also known as: drain, drains, drainage, drain pipes, drain system, drainage systems, water drainage, drainage pipe, drain pipe, drainage system, French drain, trench drain, soakaway drain

surface runoff
Water drainage that runs along a surface, as opposed to water that drains into a surface.

Also known as: drain, drainage, drain system, drainage system, drains, water drainage, drainage systems

surface water
Water drainage that goes directly to the drainage system, and does not drain through the ground.

Also known as: drainage, water drainage

tile drain
Underground, perforated plastic, clay, or concrete pipe to drain water drainage from the soil.

Also known as: drain, drains, drain pipe, drain pipes, drain system, drainage, water drainage, French drain, drainage pipe, drainage system, drainage systems, trench drain

tile drainage
A set of tile drains for water drainage.

Also known as: drains, drain, drainage, drain pipe, drain pipes, drain system, water drainage, drainage pipe, drainage systems, drainage system

underground drain
A buried drain pipe with slots or holes for collecting water drainage from the soil, such as a French drain or trench drain.

Also known as: drain, drains, drain pipe, drainage systems, drain pipes, drain system, water drainage, drainage, drainage pipe, drainage system, French drain, trench drain

water table
The underground water drainage level to which surface water will drain.

Also known as: drains, drainage, drain system, water drainage

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Frequently Asked Questions
FAQ for Drainage Experts in the Bay Area and Beyond

Q: Why choose a Diamond Certified drain system company?
A: Because Diamond Certified drainage companies end the guessing game by offering a choice of top-rated drainage system providers who have passed the most in-depth rating process. Most drainage companies can’t meet such a high standard, which means only local drain system providers rated Highest in Quality earn the Diamond Certified award. American Ratings Corporation also looks at every Diamond Certified drainage company with in-depth and ongoing research and ratings. And your drain system purchase is always backed up by the Diamond Certified Performance Guarantee. You can feel confident choosing a Diamond Certified drain company for your home drainage needs.

Q: What is a drain system?
A: A drain system is a set of parts for getting water drainage off the surface, out of the soil, and into the watershed. Important considerations in drain systems are the use of drainage materials that will meet drain volume and durability needs. Common parts of drainage systems are drain pipes and drain tile, drain gravel, drain pipe couplings, drain pipe anchors, geotextiles, and catchbasins.

Q: What is a designated drainage exit?
A: A drainage exit is a place designated by your city’s stormwater drain plan to receive rainwater runoff. The drain exit could be a sewer drain or a sloped drainage area.

Q: What should I know about different kinds of drain pipe?
A: Thin, corrugated drain pipe is cheap, but is not as strong as thicker drain pipe. Thinner drain pipe may develop low points, and may allow drain leakage at connections. Rigid drain pipe is stronger and protects better against drain problems from crushing and kinking. However, rigid drain pipe will require more drain couplings.

Q: Will a French drain system or trench drain solve problems with a swampy yard and a basement that’s always wet?
A: Absolutely. A French drain, also known as a trench drain, is made of perforated drain pipe surrounded with drainage gravel in a trench about 2 feet deep. A French drain has been the miracle cure for drainage problems around thousands of homes, and will solve many drain system problems with the yard and basement.

Q: Does the French drain or trench drain system require a geotextile filter sock to go around the drain pipe or line the trench?
A: Not necessarily, and probably not. The geotextile is sometimes used to keep silt out of drain gravel and perforated drain pipe, but is not necessary unless fluffed dirt or large amounts of dirt are used on the top of the trench drain system.

Q: Will a drain system solve the problem of a muddy drainage area between houses where grass won’t grow?
A: A French drain (trench drain) or other drainage system solution may keep the area drier, but there could also be a shade problem that is affecting grass growth in addition to the drainage problem.

Q: Will a French drain (trench drain) need to be dug up to remove blockage?
A: Digging up a French drain system might sometimes be necessary, if for example the drain pipe has been smashed. Often however, a snake will work to clear the drain pipe, or water under high pressure may restore proper drainage.

Q: Do I need more than downspout drains and splash blocks to keep stormwater drainage from my roof out of my basement and crawlspaces?
A: Underground downspout diverter drain pipes made of 4-inch sewer line may be a good drainage system solution. These diverter drain pipes can be fairly shallow, and will drain water away from forming drainage pools around a few downspout drain pipes.

Q: Is it possible to save and reuse drainage system water?
A: It could be, if you have the space for drain system tanks below or above ground, and if there are not downstream issues with water drainage rights.

Q: What’s the best way to find a good drain system company?
A: An ideal way to get good drain system and drain pipe service is to choose a Diamond Certified drain system company. Diamond Certified water drainage providers offer advantages that are hard to beat: highest scores on random customer surveys, customer-friendly business practices, customer satisfaction principles, mediation, and great guarantees on drain system services.

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