Watts LF223 1 1 2 Part of the LF223 Series SITEDRAIN relief valve spring relief valve spring Specifications Blowdown Outlet Connection Female Threaded Blowdown Outlet Size 3 4 IN Body Material Cast Iron Body Pattern Wye Brand Watts Buy American Act Compliant NO EAN 098268011753 Epoxy Coating Type None Gasket Material Fiber Filled NBR Inlet Connection Size 1 1 2 IN Inlet Connection Size Metric 40 MM Inlet Connection Type Female Threaded Inlet Thread Type NPT Lead Free NO Outlet Connection Size 1 1 2 IN Outlet Connection Type Female Threaded Outlet Thread Type NPT Part Number 0220079 Plug Material Cast Iron Retainer Cover Material Cast Iron Retainer Cover Type Tapped with Closure Plug Screen Material Stainless Steel Screen Size 20 MESH Series 77SI Strainer Type Wye WOG Rating 400 PSI Specification Sheet 77SI The adjustable reduced pressure range is 25 to 75 psi (172 to 517 kPa) commercial and industrial buildings