The Rubber Repair Kit is compatible with the 3/4” to 1” versions of the 975XL and 975XL2 Reduced Pressure Principle Backflow Preventers. These parts help keep costs down by avoiding full product replacements. Simplified repair parts allow for quick installation. Repair Kit components include two Seal Rings, two Cover O-Rings, one Relief Valve Seal Ring, one Relief Valve Diaphragm, and one Relief Valve Stem O-Ring. Repair Kits are sold as accessories for quick and simple repair needs, providing long-lasting protection from backsiphonage and backpressure of contaminated water into the potable water supply.