WATTS® 757N-OSY 4 Backflow Preventer Assembly, 4 in, Flanged, Lead-Free

This 4 in lead-free double check valve backflow preventer assembly is designed to prevent the reverse flow of contaminated water of non-potable quality from being pumped or siphoned into the potable contaminated water supply due to back siphonage and or back pressure in accordance with national plumbing codes and contaminated water authority requirements. It is ideal for protection at cross connections identified as non-health hazards and from other contaminants found at the service line entrance. This compact modular design with a single access sleeve for easy maintenance is approved for N-pattern installation in accordance with the direction of the flow arrow on the assembly. It consists of a stainless steel body, tri-link check valves, outside stem and yoke resilient seated gate valves and test cocks.

WATTS® Backflow Preventer Assembly, 757N Series Series, 4 in Nominal, Flanged Connection, 175 psi, Potable Water Media, 33-3/4 in Inlet to Outlet Length, 12-3/16 in Top to Inlet Center, Stainless Steel Body, Lead-Free, 33 to 140 deg F, 33 in W x 11-3/16 in D, "N" Body Pattern

• Extremely compact design
• 70% lighter than traditional designs
• Groove fittings allow integral pipeline adjustment
• Patented tri-link check provides lowest pressure loss
• Unmatched ease of serviceability
• Replaceable check disc rubber

• Catalog https://assets.unilogcorp.com/267/ITEM/DOC/WATTS_757_BFG_2_1_2_Catalog.pdf
• Instruction/Installation Manual https://assets.unilogcorp.com/267/ITEM/DOC/WATTS_757_BFG_2_1_2_Instruction_Installation_Manual.pdf
• Specification Sheet https://assets.unilogcorp.com/267/ITEM/DOC/WATTS_757_BFG_2_1_2_Specification_Sheet.pdf