3/4" - 1" Complete Repair Kit Compatible with Zurn Wilkins 975XL and 975XL2 Poppets Springs Seats Rebuilt Replacement Set

Application Compatible with 3/4" - 1" Wikins 975XL and 975XL2 Reduced Pressure Principle Backflow Preventer. Material Construction with quality steel, rubber and ABS material, high density, strong durability, corrosion resistance, rust resistance, non-deformation, and long service life. Function 1. Solve the water leakage problems caused by oxidation of parts. 2. Prevent backflow and back pressure of contaminated water into the potable water supply. 3. Reduce maintenance costs, provide durable protection and extend product life. Instruction Serving Check Valves 1. Remove check valve cover, spring ans poppet assembly. 2. Inspect the rubber seal ring for cuts or embedded debris. 3. Inspect valve cavity and seating area. Remove any debris. 4. If install with removable seat, unscrew seat from body and replace with new seat and lightly grease o-ring. 5. Reinstall check valve assembly. Servicing Relief Valve 1. remove relief valve cover bolts and cover. gently pull on diaphragm to remove the cartridge assembly. 2. inspect seal ring for cuts ans embedded debris. turn over or replace if required. 3. disassemble cartridge by unscrewing relief valve retaining screw. 4. inspect diaphragm and o-rings for damage. replace required parts and apply a light coat of grease to plunger o-ring. 5. carefully reassemble cartridge assembly. 6. inspect relief valve seat for wear on seating surface. if damage, replace seat and seat o-ring. 7. insert cartridge assembly into relief valve body. 8. replace relief valve cover and cover bolts. 9. place device in service and test.