Watts 957N-DOSY 4 - Part of the 957 Series Inserta Tee NPT male inlet and 3/4

NPT male inlet and 3/4 inch NPT female outlet connections

it combines robust materials

Threaded connection

This kit consists of disc assembly

Watts 957N-DOSY 4 - Part of the 957 Series Inserta Tee NPT male inlet and 3/4This 4 inch N pattern 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 the 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