Best Backflow Preventer in Washington DC

DO NOT WASTE YOUR TIME WITH THIS UNPROFESSIONAL!

I paid Maurice (aka Mr. Super Plumber) to do a plumbing job for me that took him all day to do. He promised to come back the following weekend because he needed an extra part to secure the pipe to the sink. The following weekend came, he gave me an excuse how he couldn't travel from DC to Baltimore because his mom surprised him and came in town. I was understanding and rescheduled with him the next Saturday. I called him today to confirm tomorrow's appointment and he gave me an excuse how he has no transportation to Baltimore (personal problem, not mine) to finish the job. Meanwhile, he was paid to do a service that he didn't complete. Now, I have to hire another plumber to finish the work. On top of that, (Maurice aka Mr. Super Plumber) spilled purple PVC primer all over my kitchen floor and now I have to pay someone to redo my floors because everyone knows that the plumbing primer stains on contact. He is a scammer and slick talker who doesn't honor commitments Please don't waste your money, energy, or time. Above all, he is full of excuses, is not prompt with returning calls, and will give you the run around. I added the pictures on Yelp to show proof since I was unable to post it to this thread

Durance Plumbing has helped us out of a couple binds, most recently a clogged sewer drain. They are responsive, punctual, professional, and thorough in their work.

Awesome people :) love you all dearly

Super responsive and communicative including a weekend visit at no extra cost, reasonably priced, quick with the work. We will use them again without hesitation for any future plumbing needs.