1 Backflow Plumbing

John is the owner and does the work himself. He installed a new water heater for me. He is very experienced, professional and explained everything thoroughly.

He used to build homes in the past and I picked his brain on a few other projects I am planning around the house - he was happy to help and offered great advice!

John is an absolute professional. He went above and beyond the work that I had hired him to do. He is extremely knowledgeable and talented in plumbing, as well as many other aspects of home maintainence, repair and improvement.
I have definitely added him to the short list of trusted tradesmen, of whom I’ll have work on my property again.

John Cook did all the plumbing work in my house in San Francisco. This was a big job consisting of 3 bathrooms and kitchen. During my interview process, John took notes as to what I wanted done. John email the proposal with a full explanation of the work, cost and timing. I had work with many contractors and never had one that fully listen to my demands. The proposal clearly show John paid attention. The icing on the cake was a job well done and completed on time. In fact, there were issues discover during the demo process which would have cost me more money but John took care of them and did not charge me.

John of 1 Backflow Plumbing has saved us multiple times over the last several years. He is responsive, diligent, honest, and excellent at his work. When you call, he answers the call. Recently, we experienced a horrific plumbing issue in a rainstorm just 2 days before our daughter was coming home for the winter holidays. We were also hosting house guests that week and we were panicked as our showers and toilets were dysfunctional throughout the house. John was there for us immediately. He made sure the problem was properly fixed to our satisfaction and followed up multiple times to make sure all was fine. I highly recommend 1 Backflow Plumbing.

My water heater was leaking so I called some plumbers that I found online . Most of the plumbers either referred me to an appointment and didn't call me back or told me they couldn't give me a ballpark estimate to
install a standard residential water heater . When I called One Backflow Plumbing , John answered and was very
considerate and professional . He gave me an estimate , came the next day on time and completed the job and some extras quickly and professionally leaving
no mess . I will recommend One Backflow to my friends and family as a
trustworthy contractor .