This 4 in reduced pressure zone assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. This extremely compact and lighter than a traditional designed assembly is approved for horizontal installation as long as the backflow assembly is installed in accordance with the direction of the flow arrow. 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 stainless steel body with a quick access sleeve, torsion spring check valves, resilient seated gate valves with outside stem and yoke, test cocks, and a corrosive-resistant stainless steel bottom mounted pressure relief valve.

• Lead-free
• Replaceable check disc rubber
• Compact design allows small enclosures to be used
• 70% lighter than traditional designs
• 304 (Schedule 40) stainless steel housing and sleeve
• Groove couplings for easy installation and pipe alignment
• Patented torsion spring checks provide lowest pressure loss
• Unmatched ease of serviceability
• Bottom mounted cast stainless steel relief valve
• Quick access sleeve
• UL and FM outside stem and yoke resilient seated gate valves
• In-line body pattern
• Continuous pressure operation
• Backpressure and backsiphonage protection type
• Valve to accessory

Standards/Certifications: ASSE 1013, AWWA C551-92, cCSAus B64.4, cULus classified, FCCCHR-USC, FM approved, ANSI/NSF 61 annexure G certified

• Installation Sheet https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS207_Instal.pdf
• Specification Sheet https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS207_Spec.pdf