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The NDS Dura Slope® Channel Drain is a high-performance
Heavy duty design
It can be used in horizontal or vertical applications to protect your sewer line from tree root damage
This pressure relief valve has a 2 inch NPTF female inlet and outlet and a 70 psi pressure relief setpoint
Watts 957ZRPDA-OSY-GPM 4 - Part of the 957RPDA Series ZA100F-4NH The NDS Dura Slope® ChannelThis 4 inch 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 Z pattern installation.