SHOP VALVES AND PARTS 6″ Water Valve $940.00 Back Plate $85.00 – $112.00 Jam Nut $19.00 Valve Disk $71.00 – $78.00 Valve Handle $15.00 Valve Stem $130.00 – $149.00 8″ Water Valve $1,080.00 10″ Water Valve $1,220.00 Shop MenuWater Valves 6″ Water Valve 8″ Water Valve 10″ Water Valve Parts Valve Handle Jam Nut Back Plate Valve Stem Valve Disk