The Complete Repair Kit is compatible with the 1-1/2” Model NR3XL Pressure Reducing Valves. Repair Kit components come packaged with everything you need for easy repairs, including one Union Gasket, Cartridge, Spring, Spring Disc, Friction Ring, Locknut, and Adjustment Bolt. Repair Kits are sold as accessories for quick and simple repair needs extending the life of your pressure reducing valve.