Part of the RK-N45B Series 1/2 to 1 IN Water Pressure Reducing Valve Repair Kit This repair kit includes parts needed to repair a 1/2 to 1 inch water pressure reducing valve that is used in commercial, industrial, and residential applications to reduce incoming water pressure for protection of plumbing system components and to reduce water consumption. This kit consists of an EPDM diaphragm and stainless steel strainer. Parts made of high quality material EPDM diaphragm Stainless steel strainer No special tools required