One Flow Los Angeles Backflow Installation & Repair
Company Overview
Certified backflow preventer installation and repair experts serving businesses throughout Los Angeles, the Ventura region, and the San Bernardino area. We concentrate on servicing failing backflow assemblies that ensure the safety of the water supply. We are authorized plumbers, covered up to two million dollars. As certified specialists in cross-connection control, we assist numerous residential and commercial properties across the Southern California region in managing their backflow systems. Our top priority is to ensure your water supply is never interrupted by local water authorities.
In 2015, One Flow L.A. began as an irrigation provider. As the operation developed, founder John Stoeckel explored new avenues for growth, leading to the formation of a backflow prevention division. When COVID-19 struck, John understood it was time to redirect efforts entirely to backflow prevention. Since that time, One Flow L.A. has experienced significant success and has been committed in the effort 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 start my own venture. I first launched an irrigation service in Orange County, California. After a few years of consistent growth, I was enthusiastic to explore better opportunities. This drive, 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 emerged 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 is an honest, fair, hardworking individual. His work for us was outstanding. He arrived on time, unusual for many contractors, quoted us a fair estimate and finished the job in a timely manner. I highly recommend him and I will use him for future work. You cannot go wrong with John.

I found OC Sprinkler Repair thanks to Yelp, and their quote was fair - so John came out today to work on my mom's Irrigation pipe issue. He got the job done in a pinch, and she is very happy.
He offered to do an additional service on the Sprinklers in general, so she is taking him up on it - and I will update as to how it goes! So far, so good. Thanks!

We received excellent sprinkler service repair on two separate occasions. Each time the appointment was scheduled for the next day. Excellent service and highly recommended for any sprinkler repair.

John came to fix a leak I had on an emergency basis. He is professional and did a great job. I then hired him to come and do a complete check up. he found and solved several problems my gardner had ignored. He worked for 2 days to get my system up to speed. Good job.

We called OC sprinkler service on Wednesday and our problem was fixed by Friday afternoon for half the cost of other quotes from other companies. John was polite, professional and respectful of our home. He was upfront with the costs and needs of our project. We will definitely call again for our next project.

Very happy Orange County Sprinkler Service
One of the zones in our automatic sprinkler system stopped working. We called OC Sprinkler Service on a Wednesday afternoon and they came out at 8am the next day. They diagnosed the problem for free (a 20+ year old valve had stopped working) and quoted a very reasonable price to replace the valve and surrounding plumbing in a very tight work space sunk into the patio. Repair was done in under two hours and everything works fine again. We will be very comfortable calling them back out when the next 20+ year old valve goes bad.

John was great. Very professional with contacting me and follow up. He did everything I had planned for. I would recommend him in the future.

So here we are 6 months later and over $3000 spent and all I've for is a dead lawn!
I've had john come back twice since he installed the lawn to work on the sprinkler system and ea time it's over $250 ""sprinkler tune up""
I've had several other licensed landscape companies come out this week and they all agreed the sprinkler system wasn't installed/designed correctly.
Waste of money going with John and now I find out he isn't even licensed! I guess I'm
just screwed.....

Spent a few hundred ($350-$400) on sprinkler repairs. Saw some pretty significant improvement in a few few areas but really no improvement in the majority. The sprinkler heads that were installed didn't provide the coverage needed or were the wrong type for the need. They consistently over shoot or undershoot. Tightening or listening the sprinkler head just controls the flow but ultimately the solution provided in this instance was inadequate. Had several issues with the new sprinkler heads installed.

I discovered that one set of sprinklers was not turning on. So I call the number and say to him that it's either the valve or a wire. John comes out and replaces the valve assembly in no time. The labor was peanuts and cost of the part was not much. he didn't break anything else like the last guy did. I will recommend John to my mom.