Watts 957-NRS-FS 4 - Part of the 957 Series roof-hatch-finder optional surface membrane clamp and

optional surface membrane clamp and weep hole configuration available

Viton stainless steel disc and Viton diaphragm

3 IN No hub

Specifications Body Material Ductile Iron Brand Watts Class Rating 125 or 150 Control Type Lever Handle CV Rating 302 GPM Disc Material Stainless Steel EAN 098268606348 Inlet Connection Size 3 IN Inlet Connection Type Wafer Lead Free YES Maximum Operating Temperature-Fahrenheit 248 Maximum Working Pressure-PSI 200 Minimum Temperature-Fahrenheit 33 Operating Torque-Dry 387 in-lbs Operating Torque-Wet 250 in-lbs Outlet Connection Size 3 IN Outlet Connection Type Wafer Part Number 0525811 Seat Material EPDM Series BF-04 Silicone Free Yes Stem Shaft Material 316 Stainless Steel Valve Style Wafer Specification Sheet - BF-03-M2

Watts 957-NRS-FS 4 - Part of the 957 Series roof-hatch-finder optional surface membrane clamp andThis 4 inch stainless steel reduced pressure zone assembly backflow preventer help stop the reverse flow of liquids due to backpressure or backsiphonage, where potential health hazard exists. This extremely compact and lighter than a traditional designed assembly is approved for horizontal installation in accordance with the direction of the flow arrow. This assembly consists of a stainless steel body with a quick access sleeve, torsion spring check