One Flow Los Angeles Backflow Installation & Repair
Company Overview
Qualified specialists in backflow prevention installation and repair serving commercial clients throughout Los Angeles, Ventura, and the San Bernardino area. We concentrate on repairing and replacing malfunctioning backflow assemblies that safeguard the water supply. We are authorized plumbers, covered up to two million dollars. As certified specialists in cross-connection control, we assist countless clients across Southern California in managing their backflow systems. Our top priority is to ensure your water supply is never interrupted by local water authorities.
In the year 2015, One Flow L.A. was established as an irrigation business. As the operation developed, founder John Stoeckel explored ways to expand the business, leading to the launch of a backflow prevention division. When the health crisis struck, John realized it was time to shift focus entirely to backflow prevention. Since that time, One Flow L.A. has achieved great success and has been actively involved in the fight to keep our water safe.
In my journey, I have engaged in the plumbing and irrigation industry. I was immersed in the family business, but at the age of 21, I chose to forge my own path. I originally launched an irrigation business in Orange County. After a few years of successful expansion, I was driven to explore better opportunities. This curiosity, combined with a passion for water, brought us to the backflow prevention industry. When COVID hit, we recognized it was time to dedicate ourselves to water safety. Since then, One Flow Los Angeles has established itself as a leader in backflow prevention.
Business Services
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
Business Location & Hours
Mon: | 7:00 AM - 8:00 PM |
Tue: | 7:00 AM - 8:00 PM |
Wed: | 7:00 AM - 8:00 PM |
Thu: | 7:00 AM - 8:00 PM |
Fri: | 7:00 AM - 8:00 PM |
Sat: | 9:00 AM - 5:00 PM |
Sun: | 9:00 AM - 5:00 PM |
Recommended Customer Reviews

John and his team did another great job of a complete tune-up and then some in our fairly large yard. He is responsive and knowledgable!! ...and a really nice guy!

Super polite and answer the phone quickly! Good job by John replacing our sprinklers heads!

I couldn't be happier with the job that John completed on my sprinkler system. He was prompt and responsive to my request for a quote and then did the job on schedule and at a cost that I could live with. And beside that, he's a very polite and personable young man - I would recommend him to anyone.

John Stoeckel installed smart sprinkler controller (Rachio generation 2) in my brother's house in La Habra. He was knowledgeable and his workmanship was clean and well organized. He installed the unit and programmed the controller in my smart phone for me. When there is rain, my sprinkler will not turn on, saving water. When I needed to purchase a smart sprinkler controller, he recommended to purchase Rachio generation 2 since it functions well and it is less expensive that generation 3. It was right recommendation. He is a nice and kind person, and he showed up at the appointed time. His price was fair. I recommend John for smart controller installation, and probably for other irrigation related work also, considering his workmanship, kindness and fair price.

Great service, it's just too bad he's so busy. He was helpful and had reasonable fees when he came.

After receiving a few quotes from different companies on yelp I decided to go with OC Irrigation. John helped me redo my front and back yard. We added about 10 sprinkler heads and a new control panel to my system and my grass is looking better than ever. I have already referred the to to my family. Thank you!

John was great to work with! Came in for an inspection and got right down to business. He quickly identified multiple issues with our current irrigation system, and identified solutions to correct them. When he came out to do the work, he was efficient and did the job well - no cut corners here! Others have mentioned his lack of communication, but I didn't have any issues. He's clearly a busy guy, which he should be because he does great work. Thanks John!

John doesn't not return phone calls. Been calling and left messages for two weeks. Still haven't heard back.

John is a very professional and thorough businessman. We appreciated his work last year 2017 and appreciated his work today 2018. So wonderfully refreshing to find a company and man who answers phone calls very quickly and comes out to our home ready to work, completes the job and charges accordingly. Thank you, John!!

John replied quickly to our inquiry to setup an appointment for a free assessment. He came by a day or so later and gave a thorough evaluation of our front sprinklers. He found the issues with our poor flow and coverage and provided a good estimate within our stated budget. He and his coworker came back a week later and changed out a valve, located and replaced a broken/leaking head, moved one head 2' for wider coverage, and tuned all the heads. Our front sprinklers work great now with excellent coverage with half the watering time we were used to. There's essentially no evidence of the holes they dug! Excellent service we're happy to recommend and revisit if needed. Thanks John!