Watts LF3001 GB 2 Part of the LF3001A Series R304 Detectable Warning Surfaces overflow roof drain features a overflow roof drain features a flashing clamp with an integral 4 inch internal standpipe Specifications Blowdown Outlet Connection Female Threaded Blowdown Outlet Size 3 4 IN Body Material Cast Iron Body Pattern Wye Brand Watts Class Rating 126 EAN 098268833010 Epoxy Coating Type None Gasket Material Garlock Inlet Connection Size 1 IN Inlet Connection Size Metric 25 MM Inlet Connection Type Female Threaded Inlet Thread Type NPT Lead Free YES Outlet Connection Size 1 IN Outlet Connection Type Female Threaded Outlet Thread Type NPT Part Number 0220316 Plug Material Cast Iron Retainer Cover Material Cast Iron Retainer Cover Type Tapped with Closure Plug Screen Material Stainless Steel Screen Size 40 MESH Series 77S Strainer Type Wye WOG Rating 400 PSI Specification Sheet 77S M1 This 2 inch lead free dielectric union is used in commercial and residential applications to prevent accelerated corrosion and deterioration in the piping system due to galvanic and stray current and an EPDM gasket that separates the tailpieces to prevent an electric current from occurring