RK34-975XLR - 3/4"-1" Model 975XL/XL2 Rubber Repair KitZurn RK34 975XLR 3 4" 1" Model 975XL XL2 Rubber Repair Kit The Rubber Repair Kit is compatible with the 3 4 1 Model 975XL and 975XL2 Reduced Pressure Principle Backflow Preventers. 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