Backflow Prevention

When Water Flows the Wrong Way

Backflow can occur when water pressure suddenly drops—sometimes from a water-main break or firefighting activity—allowing contaminated water to reverse direction and enter the clean-water supply.
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Protecting Water Quality. Ensuring Compliance. Preventing Contamination.

Backflow prevention systems protect potable water supplies from contamination caused by unwanted reversals in water flow. NJ Mechanical provides professional backflow testing, installation, certification, repair, and replacement services for commercial, industrial, institutional, and residential properties.

Our experienced technicians help property owners and facility managers maintain dependable protection, meet applicable code requirements, and keep backflow assemblies operating as intended.

Our Backflow Prevention Services

Backflow Testing & Certification
Backflow preventers require routine testing to verify that their internal valves and safety components are functioning correctly. NJ Mechanical performs thorough testing and provides the documentation needed for certification and regulatory compliance.
RPZ Assemblies
Reduced Pressure Zone—or RPZ—assemblies provide a high level of protection in applications where contamination could present a significant health hazard. We test, install, repair, and replace RPZ assemblies to help safeguard potable water systems.
Backflow Installation
Proper selection and installation are essential to effective backflow protection. NJ Mechanical installs appropriately sized backflow prevention assemblies based on the property’s water system, application, hazard level, and applicable code requirements.
Backflow Repair & Replacement
Worn seals, damaged valves, corrosion, and freezing conditions can cause a backflow preventer to malfunction or fail testing. Our technicians diagnose problems and complete the necessary repairs or replacement to restore reliable operation.
Cross-Connection Control
Cross-connections can create pathways for contaminants to enter a potable water supply. NJ Mechanical helps identify potential risks and provides solutions that isolate these connections and protect the integrity of the building’s water system.

Protection at Every Connection

Backflow prevention is an important safeguard for both individual properties and the public water supply. From routine testing and certification to complete assembly installation, NJ Mechanical delivers knowledgeable service, reliable workmanship, and solutions designed for continued compliance.

Contact NJ Mechanical to schedule backflow testing, certification, repair, or installation.