Watts 957-NRS-S-SS 4 - Part of the 957 Series Geotextile a replaceable seat module and

a replaceable seat module and a bypass feature to control thermal expansion pressure

18” and 24” with thicknesses of 40 mil

and areas where debris accumulation is a concern

Molded diaphragm with a special thermo plastic coating to prevent rust

Compact space saving design

Watts 957-NRS-S-SS 4 - Part of the 957 Series Geotextile a replaceable seat module andThis 4 IN reduced pressure zone assembly backflow preventer helps prevent the reverse flow of fire protection substances and water of non potable quality from being pumped or siphoned into potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. This extremely compact and lighter than a traditional designed assembly is approved for horizontal installation as long as the