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This 2 1/2-3 IN rubber parts kit for single check for series 709 helps to prevent the reverse flow of polluted water from entering into the potable water supply
Z325-4NH-G
Deep Profile Channel and connect to 3 in
Z627-2NH-DG
Features High pressure applications and gauge tapping with plug
Watts 757-NRS-GXG 6 - Part of the 757 Series Hanes Geo This 2 1/2-3 IN rubberThis 6 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