lead free boiler drain valve Size:1/2"-3/4" Material:C37700,MS58(CuZn40Pb2),CuZn39Pb3,CW602N Connection thread:NPT,BSP,BSPT lead free boiler drain valveMaterial:C37700, MS58(CuZn40Pb2), CuZn39Pb3, CW602N, C83600, C84400Thread end: NPT, BSP, BSPT125 WOGBoiler drain-Less stuffing boxBrass BodyHosexMIP1/2''&3/4''1/2''MIP X1/2'' Solder Inlet lead free boiler drain valve