FAQ
Do Restaurants and Commercial Kitchens Need Backflow Preventers in New Jersey?
The food service industry creates some of the most significant backflow risks in any commercial environment. Commercial kitchens are filled with cross-connections: pre-rinse spray valves, dishwashers, ice machines, carbonated beverage systems, steam kettles, food processing equipment, and mop sinks all create pathways between potable water and substances that would be hazardous if introduced into the public supply. In New Jersey, restaurants and food service facilities are required to have appropriate backflow prevention devices on virtually every water-using appliance and connection.
For a foundational understanding of what backflow prevention devices are and how they protect your facility, see our guide to what a backflow preventer is and how it works.
Why Restaurants Are High-Risk Backflow Environments
Commercial kitchen plumbing is uniquely complex from a cross-connection standpoint. Consider the multiple simultaneous cross-connection risks in a typical New Jersey restaurant:
Commercial dishwashers: High-temperature, high-pressure dishwashers use chemical sanitizers and rinse additives. The water in a dishwasher during operation contains detergent, sanitizer, and food soils at concentrations far above potable water standards.
Pre-rinse spray assemblies: Under-counter pre-rinse units are among the most common sources of backflow incidents in commercial kitchens. The spray head is frequently submerged in food-contaminated water in sinks.
Carbonated beverage systems: Post-mix soda systems use carbonation injectors that create back-pressure backflow risk — carbonated water at elevated pressure can push backward into the potable supply if a check valve fails.
Garbage disposals and pot sinks: Direct water connections to garbage disposal units and three-compartment pot sinks can create cross-connections with food waste water.
Steam equipment: Steam kettles, steam tables, and combi ovens have water supply connections that create cross-connections with food-contact surfaces.
Ice machines: Commercial ice machines have water supply connections that create cross-connections with internal components that may accumulate biofilm and mineral scale.
What Devices Are Required?
Main Water Service Connection
Most New Jersey water authorities require a service protection device — typically an RPZ assembly — on the main water service connection for commercial food service facilities. This protects against any backflow from the building’s complex internal plumbing into the public supply.
Individual Equipment Connections
In addition to the service protection device, specific appliances and equipment connections within the kitchen require their own backflow protection:
Commercial dishwashers: RPZ assemblies are typically required at the water supply connection, given the chemical additives present in the wash cycle
Carbonated beverage equipment: RPZ or specifically rated carbonator-service backflow prevention assemblies are required on all carbonated beverage system water supplies
Pre-rinse spray assemblies: Vacuum breaker-equipped spray heads are required on all pre-rinse units; these are often integrated into the spray assembly itself
Garbage disposal supply connections: DCVA or RPZ protection depending on the local water authority’s hazard classification
New Jersey Health Department Inspections and Backflow Compliance
New Jersey restaurant health inspections — conducted by the New Jersey Department of Health and local health departments — include evaluation of cross-connection control as part of the plumbing inspection component. A facility with missing or non-compliant backflow prevention devices can receive a health code violation that must be corrected before the inspection is closed. Serious violations can result in temporary closure orders.
For food service operators, the best way to ensure compliance is to work with a backflow prevention specialist who understands commercial kitchen requirements thoroughly. South Jersey Backflow has extensive experience with restaurant backflow installations and annual testing throughout all of New Jersey. Our professional backflow testing and certification service service satisfies both water authority and health department requirements. contact South Jersey Backflow.
Annual Testing for Restaurant Backflow Devices
Like all backflow prevention devices in New Jersey, restaurant and food service devices must be tested and certified annually. For facilities with multiple devices, South Jersey Backflow coordinates a comprehensive annual test visit that covers all devices in a single appointment, minimizing disruption to kitchen operations. We handle all test report filings with your water authority. See our backflow preventer installation, testing, and rebuilding costs guide for commercial testing pricing.
Schedule Your Backflow Service Anywhere in New Jersey
South Jersey Backflow has proudly served residential and commercial customers across all of New Jersey since 2004. Our certified technicians provide annual backflow testing and certification, expert repairs and rebuilds, and protective backflow enclosures — all with transparent pricing, complete paperwork handling, and 24/7 emergency availability. Call (856) 291-6809 or contact us online to get started today.