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Diamond Certified Company Report

Professor Plumb
We declare that this company HAS QUALIFIED for and continues to meet the Ongoing Research and Rating Requirements for Diamond Certified® status.
4 Consecutive Years  Certificate #2066

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Based on 125 surveys of verified customers

Company Credentials

Workers Compensation
Liability Insurance
License Verification
Business Practices
Current Complaint File

Diamond Certified Qualification

Based on 125 customer surveys, we declare
Professor Plumb
has passed all rating steps and has earned
The Diamond Certified Award
No. 2066
Continuously qualified since October 2013.
David Pak
Director of Ratings Research
American Ratings Corporation

Verbatim Survey Responses

F. P. A.   Verified Customer Name
“I liked that they were prompt and followed through on what they were supposed to do for the job.”
F. R.   Verified Customer Name
“I really liked the communication and the accuracy of the estimate for the time the job would take. I needed someone ...” (more)
V. E.  Verified Customer Name
“I like that they do a very good job of servicing our boilers.”
Click to read all survey responses

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Professor Plumb provides a wide range of services in San Francisco, San Mateo, Marin, Napa and Sonoma Counties. In addition to installing, repairing and maintaining boilers, high-efficiency equipment, faucets, toilets, and water and gas lines, the company specializes in designing and installing hydronic/radiant heat and solar thermal hot water systems.