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It is designed to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage
slot with integrated rail is heel-proof and ADA compliant
and pressure relief setpoint of 45 psi
Watts 4 IN model 408-OSY-RW
Watts LF957NRPDA-DOSY-CFM 4 - Part of the LF957RPDA Series Drain Fitting It is designed to preventThis 4 inch lead free N pattern reduced pressure detector backflow preventer 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. Extremely compact and lighter than traditional designs it is approved for horizontal N