Watts 957-NRS-S-SS 4 - Part of the 957 Series dura-skrim-selector and other costly water damage

and other costly water damage

Raised external water dam to establish controlled overflow level

Z645-3NL-TS

For use in fire-service systems

Watts 957-NRS-S-SS 4 - Part of the 957 Series dura-skrim-selector and other costly water damageThis 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