Certified to Inspect, Test, and Certify PVB, SPVB, RPZ, and Double Check Valve Assemblies.
Certified Backflow Testing
Protecting Your Water Supply Starts Here
We provide certified backflow prevention testing for residential and commercial properties to help keep your drinking water safe and ensure compliance with local regulations.
Pressure Vacuum Breaker (PVB)
Designed to help prevent contaminated water from flowing back into your potable water system.
Spill-Resistant Pressure Vacuum Breaker (SPVB)
Provides additional protection while meeting specific installation requirements.
Double Check Valve Assembly (DCVA)
Commonly used for fire sprinkler systems and commercial water connections.
We Test & Certify
What Is Backflow Testing?
Backflow occurs when contaminated water flows in the opposite direction and enters the clean water supply. A certified backflow test verifies that your backflow prevention device is working properly and protecting your property's drinking water.
Reduced Pressure Zone Assembly (RPZ)
One of the highest levels of backflow protection for commercial and high-risk applications.
Protects Drinking Water
Helps prevent contaminants from entering your clean water supply.
Meets Local Requirements
Many municipalities require periodic backflow testing to remain compliant.
Residential & Commercial
Available for homes, businesses, commercial buildings, and multi-unit properties.
We Test & Certify
Why Is Backflow Testing Important?
Certified Testing
Testing performed by a certified backflow prevention tester.
Need Your Backflow Device Tested?
Whether it's your annual certification or a new installation, Castro Plumbing is ready to help.