From shopping centers, apartment communities to restaurants, service stations, department stores and industrial facilities; we are the trusted choice for backflow prevention testing, installation and repair services across Southern California.
Everything Done for Your Backflow Installation, Testing & Repair.
Guaranteed backflow testing compliance.
Ask for Repair Coverage & Multi-location Discounts.
As licensed contractors, certified backflow experts and trusted cross connection control specialists, we provide Los Angeles, Orange, San Diego, San Bernardino, Riverside and Ventura County residential and business communities turn-key backflow testing, installation, repairs services to keep our local water clean and help you avoid water disruptions, fines and civil liability.
Call us to Qualify for Included Warranty, Repair Coverage & Multi-location pricing for your Ventura County Backflow Prevention Testing Installation & Repair Requirements!
Call us to Qualify for Included Warranty, Repair Coverage & Multi-location pricing for your Los Angeles Backflow Prevention Testing Installation & Repair Requirements!
Call us to Qualify for Included Warranty, Repair Coverage & Multi-location pricing for your Orange County Backflow Prevention Testing Installation & Repair Requirements!
Call us to Qualify for Included Warranty, Repair Coverage & Multi-location pricing for your San Bernardino County Backflow Prevention Testing Installation & Repair Requirements!
Call us to Qualify for Included Warranty, Repair Coverage & Multi-location pricing for your Riverside County Backflow Prevention Testing Installation & Repair Requirements!
Call us to Qualify for Included Warranty, Repair Coverage & Multi-location pricing for your San Diego County Backflow Prevention Testing Installation & Repair Requirements!
From the single family homes and apartment communities to restaurants, service stations, department stores and industrial facilities; we are the trusted choice for backflow prevention testing and repair services across Southern California. Our certified specialists ensure that every backflow prevention device is properly inspected, tested, and repaired to safeguard your water supply and maintain full compliance with local and state regulations. Whether you're a homeowner, property manager, or business owner; we offer fast, reliable service, including priority scheduling, same-day certification, and emergency repairs.
With a reputation built on expertise, integrity and customer satisfaction, we provide affordable, backflow testing and repair solutions that protect both your business and the public water supply.
Sydney and her team are amazing.
They've been taking care of all of our backflow needs for years. Everything is so convenient, and they even saved us money when it was time to replace our main backflow valve
Honest and reliable company. Excellent service. I highly recommend their annual backflow testing and repair services.
I manage a hotel in Garden Grove, near Disneyland and I am very happy with the service One Flow Backflow Test Pros provides.
I have been using them for 3 years now. Their customer service and reliability are top notch.
I highly recommend them. They handle everything professionally, they even submit the paper work to the city for me.
John and his One Flow team have assisted me on multiple occasions where it was after hours and short notice. Most recently I needed assistance and even though he was on vacation he still arranged to get my testing completed.
On time, professional, knowledgeable, and willing to help resolve unforeseen issues when on site. Definitely the company I reach out to whenever I have needs.
Honest and reliable company. I have used them for a few years and they are always available for testing and repairs.
This company is great! They handle everything professionally, they even submit the paper work to the city for me. Thank you so much!
Wow! This company raises the bar every time I call. They are reliable and do excellent work!
The testing is easy, the repairs are affordable, and I'm able to schedule around my store hours to avoid disruption to my water.
Outstanding service, highly recommend.
We've used One Flow Backflow Test Pros for for years.
They provide dependable service, and submit our paperwork on time. We also really like their multi-device discounts!
Highly recommend them for certification and repairs of backflow preventer devices.
