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High quality engineered plastic
The material is available in 40 mil
and a steel handwheel
or courtyard
Watts 774-DOSY 6 - Part of the 774 Series Window Well Extension High quality engineered plasticThis 6 inch 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 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 hazard applications and from other non toxic
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