Backflow Prevention in NJ: Requirements, Testing & Installation

Backflow prevention is a critical but often overlooked aspect of your plumbing system. In New Jersey, both residential and commercial properties can be required to have approved backflow prevention devices.

What Is Backflow?

Backflow occurs when water flows in the reverse of its intended direction — from a potentially contaminated source back into the clean water supply. This can happen due to back-pressure or back-siphonage.

NJ Backflow Prevention Requirements

Requirements vary by municipality across Northern NJ counties but generally apply to irrigation systems, homes with swimming pools, commercial properties, healthcare facilities, properties with fire sprinklers, and any property with a private well in addition to public water.

Annual Testing Requirements

New Jersey requires annual testing of backflow prevention assemblies by a licensed tester. Many municipalities send notices requiring proof of testing. Failure to test can result in water service disconnection. Testing typically costs $75–$150.

Types of Backflow Preventers

• Pressure Vacuum Breaker (PVB): Common for irrigation systems
• Double Check Valve Assembly (DCVA): Used for low-to-medium hazard applications
• Reduced Pressure Zone (RPZ): Required for high-hazard connections; provides maximum protection

Perfect Plumbing is a licensed backflow prevention tester and installer serving all of Northern New Jersey. Call 973-221-8802 for a free consultation.