Backflow Prevention & Testing Services

Certified, Reliable Backflow Solutions – Powered by In-House Expertise

At United Drain & Plumbing, we provide professional backflow prevention, testing, repair, and installation services throughout Southern California. We proudly serve commercial buildings, multifamily properties, and property management companies — ensuring your water systems are safe, compliant, and properly maintained.

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What Is Backflow — and Why It Matters

Backflow occurs when water flows in the wrong direction, potentially allowing contaminants into your clean water supply. To prevent this, properties are required to install and maintain backflow prevention assemblies — and most must be tested annually.

Certified, Insured & Field-Tested

Our technicians are both AWWA-certified and L.A. county certified. Trained in-house using the same tools and scenarios they’ll face on-site. From ¾" residential units to large-scale 12" commercial assemblies, we handle the full range of devices quickly, cleanly, and professionally.

What Makes United Different?

We’re not just certified — we train the certified. United Drain & Plumbing operates a fully equipped, in-house training facility, complete with a dedicated classroom and real-world test equipment. Every technician who works on your property is trained to meet the highest industry standards, and we stay ahead of changing codes, regulations, and technologies.

OUR SERVICES

Whatever your needs, United Drain & Plumbing has the knowledge experience to do the job right.

Annual Backflow Testing & certification

Certified testing for all sizes and types of devices

Digital reporting submitted directly to water authorities

Automated reminders when your device is due

Installation & Replacement

Domestic, irrigation, and fire-line applications

Code-compliant placement and drainage

Upgrade or retrofit of outdated assemblies

Backflow Repairs & Maintenance

Diagnosis and repair of leaking or non-compliant devices

Replacement of internal parts and gaskets

Pressure troubleshooting and performance optimization

Compliance Support

Assistance with water district requirements

All paperwork handled for you

Inspection readiness and site labeling

For more information or to schedule an appointment, please call us today.

(877) 921-9000

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