Watts 757-OSY 3 - Part of the 757 Series Strip Drian this unit has a 4

this unit has a 4 inch cast iron pipe size (CIPS) coupler for easy connection to the underground supply (AWWA C900 PVC) and 4 inch ductile iron pipe industry standard flanged-end connection (AWWA C606) on the building side for easy connection to the overhead fire sprinkler system

a stainless steel retainer cap with PTFE gasket and blow-down plug

UPC - 098268653793

UPC - 098268288803

or use it to seal off one end

Watts 757-OSY 3 - Part of the 757 Series Strip Drian this unit has a 4This 3 inch lead free double check valve backflow preventer assembly is designed to prevent the reverse flow of 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. It is ideal for protection at cross connections identified as non health hazards and from other contaminants found at the service line