One Flow Los Angeles Backflow Installation & Repair

★★★★★ 4.7 / 5 (99)
: Long Beach, CA 90807
: (310) 753-7325
: http://oneflowlosangeles.com

Company Overview

Licensed professionals for backflow installation and repair serving corporate customers throughout L.A., Ventura, and San Bernardino County. We specialize in servicing defective backflow assemblies that protect the water supply. We are authorized plumbers, insured up to $2M. As American Water Works Association Certified Cross-Connection Control Specialists, we assist countless clients across Southern California in managing their backflow systems. Our top priority is to keep your water service uninterrupted by local water authorities.

In the year 2015, One Flow L.A. began as an irrigation service company. As the operation developed, founder John Stoeckel explored additional growth opportunities, leading to the formation of a backflow prevention division. When the pandemic struck, John recognized it was time to redirect efforts entirely to backflow prevention. Since that time, One Flow L.A. has enjoyed great success and has been committed in the fight to keep our water safe.

Throughout my life, I have engaged in the plumbing and irrigation industry. I was raised in the family business, but at 21 years old, I decided to forge my own path. I initially launched an irrigation service in Orange County, California. After a few years of successful expansion, I was driven to seek out better opportunities. This curiosity, combined with a passion for water, guided us into the backflow prevention industry. When the crisis hit, we recognized it was time to focus entirely to water safety. Since then, One Flow Los Angeles has become 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

Russell Y.
★★★★★

Finally! A backflow testing company that is professional and reliable. I've struggled in the past to find a legitimate backflow testing company. Let me tell you, this is them! The entire process was so smooth, One Flow Los Angeles surpassed all my expectations. Thank you!

Michelle K.
★★★★★

Literally the best people to work with. Our third year getting our yearly backflow checked for our small business and we will be contacting them again for next year and the years to come!

Edwardo C.
★★★★★

I received a notice from the LA County Health that I needed to install a backflow preventer at my restaurant. I had no clue whatsoever what a backflow preventer was at the moment. After Googling what a backflow was I called these guys lol. They gave me a great quote for backflow installation and were really responsive. They even performed the backflow test and submitted the report. Fantastic service!

Brent O.
★★★★★

I have used OC Irrigation Service several times, and every time John has gotten the job done for a reasonable price and quickly. If you need any irrigation work done I'd highly recommend them.

Carrie P.
★★★★★

John did a great job with updating our sprinkler system and installing a new wireless controller. He offered suggestions and gave very professional estimates. He was easy to work with and did a professional job. I highly recommend him.

Soo P.
★★☆☆☆

We had an issue with flooding where the gate valve or irrigation valve shutoff was. The guy went over our whole sprinkler system and told us where we needed to replace sprinkler heads, etc. He said it was a leak more to the street side of where the sprinkler shutoff valve box was. He said he would email an estimate and summary. Never got it. He did not return my texts either after he came out.

Bill G.
★★★★★

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!

Priscylla G.
★★★★★

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

Edward K.
★★★★★

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.

Seon K.
★★★★★

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.

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