2 1/2 To 3 In Watts Backflow Repair Kit, Lead Free, For 909-Rv_This repair kit is for the replacement of the 2 1/2 to 3 inch lead free backflow preventer relief valve series 909-RV. It consists of a diaphragm, disc, molded disc assembly, piston O-ring, stem O-ring and cover O-ring._Original parts insure long service life_No special tools required for changing parts_Parts made of high quality material_Factory replacement kit_Specifications_ADA Compliant N_Brand Watts_Kit Contents Sleeve O-Ring, Piston O-Ring, Stem O-Ring, Rv Disc Assembly, Diaphragm, Piston Seal, Bottom Plug O-Ring, Adapter O-Ring And Lubricant_Kit Type Relief Valve Rubber Parts Kit_Lead Free YES_Part Number 0794081_Product Group BACKFLOW KITS_Products Used On LF909, 909_Products Used On Size 2 1/2 IN to 3 IN_Series RK-LF909