【Equivalent to Part】RK34-375 Complete Backflow Repair Kit, for Backflow Preventer Check Valves and Relief Valve Rebuild. 【Compatible Models】A speedy backflow preventer repair parts kit, check relief valve rubber and other plastic components, compatible with Zurn Wilkins1/2 - 3/4 inches 375/375XL/375ST Backflow Preventers. 【Solved leakage Issue】After replacement, the water leakage caused by the oxidation of the parts can be solved. Regular repairs involve disassembling the device, replacing the necessary rubber parts of your 375 backflow preventer, saving much time and money, and avoiding a complete replacement of reduced reduced-pressure principle assembly. 【Durable Material】Made of ABS material, stainless steel, and upgraded rubber,suitable for your 375 backflow preventer. Ensure extending the backflow preventer life and minimize the problem of frequent parts replacement. 【What You Get】This RK34-375 backflow preventer repair rubber set consists of 13 parts: a relief valve seat、relief valve spring、relief valve stem assembly、Check Spring Retainer. Almost all rubber o-rings your backflow needs are included. Backflow Preventer Check Valves and Relief Valve Rebuild，RK34-375 Repair Kit