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ZN400J-4IP
ductile iron disc
Stainless steel spring
Specifications Adapter Material Steel Brand Watts Buy American Act Compliant NO Class Rating Does Not Apply To Product EAN 098268430240 Gasket Material Buna-N Gasket Maximum Pressure 250 PSI Gasket Maximum Pressure-BAR 17
Watts 757-OSY 4 - Part of the 757 Series ZC100F-2NH ZN400J-4IPThis 4 inch lead free double check valve backflow preventer assembly is designed to prevent the reverse flow of 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. It is ideal for protection at cross connections identified as non health hazards and from other contaminants found at the service line
