Terry's Testing isn’t just your typical backflow testing agency—think of us as the family you never knew you needed, here to keep your water flowing safely in LA, Orange, San Bernardino, and Riverside counties. We might not show up with cookies, but we do bring top-notch backflow testing to protect your home and business. We’re all about keeping things safe and up to code, without the technical jargon—just like family, we’re here to make sure things don’t get too messy! We handle all the paperwork and filling with your local water authority so you don't have to.

When it's time to say goodbye to your old backflow device, we’ll install a shiny new one—no tears, we promise. 

Have questions? Need advice? We're here to explain everything in plain English, not plumber-speak.

​Backflow Leaking

Got an old backflow system that’s so outdated they don’t even make the parts anymore? We can whip up the perfect piece to fit those hard-to-find sizes. 

We’re here to protect your backflow device like it's the family pet—only we don’t have to feed this one.

Water Pressure Issues

If it’s broken, leaking, or just being fussy, we’ll fix it up like Grandpa fixes the family car (but faster and without all the breaks)

​​ Device Repair

Annual Certification

​Leaking Pipes

The ol’ checkup for your water system—because nobody likes a surprise flow in the wrong direction!

Custom Fabrication

​​Backflow Consultations

24/7 Emergency Services

Backflow Replacement

Services

If your backflow's sprung a leak, we’re on it! 

Got a shower that feels like it’s just drizzling? We’ll bring the power back, so you don’t have to dance around the water drops! 

Drip. Drip. Drip. No one’s got time for that. We’ll swoop in and stop that leak before it drives you nuts.

Reduced Pressure Principle (RP)

Double Check (DC)

Pressure Vacuum Breaker (PVB)

​DCDA and RPDA's

​Cage Installation

Water problems don’t keep office hours, and neither do we! Call us anytime, day or night—seriously, we’ve got coffee on standby to tackle your emergencies.