The Complete Rubber Repair Kit is compatible with the 6” Model 375DA, 375ADA, 375ASTDA, 475DA, 475DAV, 475STDA, and 475STDAV Reduced Pressure Principle Backflow Preventer. Repair Kit components include two Seat O-Rings, eight Poppet Bolt O-Rings, two Seal Rings, one Bypass Rubber Repair Kit, and one 2-1/2”-6” Relief Valve Rubber Repair Kit. Watch the Zurn Wilkins YouTube channel for more information and step-by-step instructions. The accessories within the kit allow you to speed up repairs, while lowering maintenance costs and extending the product life. The Zurn Wilkins portfolio offers long-lasting protection from backsiphonage and backpressure of contaminated water into the potable water supply.