This 4 in lead-free reduced pressure zone assembly with its exclusive design incorporating the air-in and water-out principle for protection during an emergency condition prevents the flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. It can be utilized in a variety of installations without the need of any special tools. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and from other contaminants found at the service line entrance. This assembly consists of a lead-free body, non-rising stem resilient seated gate valves, captured spring check valves, replaceable seats, top mounted test cocks, and a field reversible pressure differential relief valve.

• Lead-free construction
• Replaceable seats
• Stainless steel internal parts
• No special tools required for servicing
• Captured spring check assemblies
• Fused epoxy coated and lined checks
• Industrial strength sensing hose
• Field reversible relief valve
• Air-in/water-out relief valve design provides maximum capacity during emergency conditions
• Health hazard application
• Epoxy coated body finish
• In-line body pattern
• Continuous pressure operation
• Backpressure and backsiphonage protection type

Standards/Certifications: ASSE 1013, AWWA C511-92, cCSAus B64.4, IAPMO PS 31, SBCCI, ANSI/NSF 61 annexure G, FM approved, cULus listed

• Installation Sheet https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS911_Instal.pdf
• Specification Sheet https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS911_Spec.pdf