
Anyone that owns a home understands that plumbing issues can never be foreseen. Our professional plumbers deliver fast, dependable service whether clearing a drain or installing a tankless water heater.
In addressing issues with plumbing systems such as water heaters, faucets, sinks, toilets, bathtubs, showers and garbage disposals, Guaranteed Plumbing carefully assesses the situation, makes an accurate diagnosis, and fixes the problem correctly the first time.
Guaranteed Plumbing offers full service commercial plumbing installation and maintenance. No other company is trusted or recommended more in Contra Costa and Alameda Counties. RFP Quick Quotes!
We are a full-service plumbing company that is licensed, bonded and insured and fully-versed in city codes; preferred vendor of the Town of Danville Building Department and a certified installer for Takagi Noritz tankless water heaters. Count on Guaranteed Plumbing for all your plumbing repair and service.


Forget the snake! Now we have our very own Hydrojetter! Call us when you need your lines cleared out!
A hydrojetter is a vastly better pipe cleaner compared to a snake. A hydrojetter can completely remove any blockages as opposed to punching a smaller hole like a snake will. A hydrojetter also will clean the entire pipe instead of just removing blockages.
Testimonials
Plumbing Specialists since 2003
We offer plumbing services and solutions for every type of issue – from common clogs to a full mainline replacement.
We just used Guaranteed Plumbing this past week based on other recommendations on this site and found them very helpful and reasonable. They showed up early, did the work and I thought they did a great job (they ran gas & install logs). Also, got gas logs for Patio and Fireplace.
Jacob B.
CustomerGuaranteed Plumbing (in Danville) did all of our outside work and I think they did a great job. I worked mostly with Damon and he was great start to finish.
Michael T.
Customer…I second that - they were great and reasonably priced
Olga B.
CustomerYour service department did a great job at my home cleaning out the sewage line. The service tech had a great attitude, and was very patient as he looked for my cleanouts which were covered by landscaping. Due to your work we got things back to normal within the evening
William Cox
CustomerI am one of their loyal customers and have recommended their services to my friends because of the prompt and courteous service that their plumbing team provides and the high quality of workmanship I can expect every time.