Managed Backflow
Testing & Repair Maintenance

As a water authority certified backflow tester, cross connect specialist, and bonded + insured CA licensed contractor, backflow Test Pros is 100% dedicated to backflow assembly installation, testing and maintenance.

With a reputation built on expertise, integrity and customer satisfaction, we provide affordable, backflow testing and repair services and manage every step of the local water authority compliance process in an otherwise complicated and time consuming process to ensure your residential or commerical property meets national, state and municipal compliance regulations.

(800) 803-6658
Multi-Device Discount
CA Contractor License
Bonded
Insured for over $2,000,000
Free Repair Coverage
Serving All of Southern California
Same Day Certification
Priority Booking
Backflow Certified
Emergency Service

Everything Done For You

Backflow Test Pros simplifies the backflow maintenance and compliance process by helping responsible businesses avoid violations and noncompliance when a new backflow device is installed, repaired, or relocated

Backflow Device Testing

No matter what the type and size of your backflow devices, Backflow Test Pros' certified backflow specialized technicians have the knowledge and experience to ensure your backflow devices are properly tested to meet local water authority backflow prevention test compliance requirements.

From obtaining and deciphering your annual water department backflow test report letters to communicating your test results with the local water authority and ensuring your backflow test compliance is documented before due dates, we manage your backflow test prevention compliance process so you can focus on your business.

We specialize in delivering managed, hassel-free backflow maintenance services that go beyond simply testing your backflow devices.

  • Professional, Hassel-Free Service
  • Everything Done for You
  • Availability Outside Business Hours
  • Multi-Device Test Discounts
  • Advanced Scheduling
  • Due Date Monitoring
  • Fire Line Test Mode Assistance
  • Water Authority Documentation
  • Discounted Cage
  • Free Device Lock
  • 24/7 Backflow Expert Support
  • Up to $500 Repair Credit

Backflow Device Repair

Our certified backflow technicians are prepared for any and all backflow leaks, breaks and failures. No matter how serious or urgent your backflow repair, we’ve got you covered. Unlike general plumbers, our certified backflow technicians specialize in backflow installs, testing, repair and replacement .

So whether you need a test or risk having your water shut off due to backflow leaks, failures and breaks; our Industry leading backflow specialized technicians have the knowledge and experience to ensure your backflow devices meet local water authority compliance to prevent your water from being shut off.

Backflow Device Troubleshooting

Got Backflow questions? One Flow has answers. Our backflow certified technicians' diagnostic skills acquired through years of field experience seperate our backflow technicians from general plumbing industry professionals.

So, whether you have a minor repair or complex break or failure which risks having your water turned off, our managed backflow maintenance services ensure you can focus on your business knowing that you have One Flow's certified technicians diagnosing and resolving unanticipated backflow issues like failing backflow, leakling backflow, pressure loss after backflow, and no flow through backflow.

Backflow Device Installation

Our licensed contractors guarantee compliance with local water authority standards and state contractor plumbing codes for backflow installations, repairs, and replacements of all types and sizes.

Our managed backflow testing and maintenance service manages every step of the local water authority compliance process and simplifies an otherwise complicated and time consuming process of backflow testing and maintenance.

Lock your 2025 pricing with multi-location scheduling

Best price guarantee. Schedule in advance with confidence of knowing you're receiving best in class service for the most competitive price.

Recognized by National, State & Local Backflow Certification Organizations

As a water authority certified backflow tester, cross connect specialist, and bonded + insured CA licensed contractor, backflow Test Pros is 100% dedicated to backflow assembly installation, testing and maintenance. Our managed backflow testing and maintenance service manages every step of the local water authority compliance process and simplifies an otherwise complicated and time consuming process of backflow testing and maintenance.

Avoid Water Service Disruptions, Civil Liabilities & Fines

Backflow Test Pros provides dedicated support in everything from initial scheduling, water department communications, due date tracking, same day approval, routine maintenance and urgent repairs.

As a Backflow Test Pros client you can rest assured knowing that your backflows assemblies are monitored and compliant with local water authority regulations.

Backflow Test Pros Turn-key Backflow Maintenance includes:

  • Backflow Installation
  • Backflow Prevention Testing
  • Backflow Repair Replacement
  • Backflow Management
  • Backflow Repair Coverage
  • Multi-Device Discounts
  • Emergency Service
  • Serving Southern California
  • Multi-Location Scheduling
  • Test Document Retrieval
  • Due Date Extensions
  • Same-Day Certification
  • Free Lock Upgrades
  • Priority Scheduling

Trusted by Residential & Commercial Clients Throughout Southern California

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.

Costco

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.


Hilton Hotels

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.

Davita Dialysis

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.

Flame Broiler

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!

Chick-Fil-A

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.


ARCO Gas Stations

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 devices.