The 375 Repair Kits are compatible with the 1/4”-10” Model 375, 375A, 375ADA, 375AST, 375ASTDA, 375DA, and 375XL Reduced Pressure Principle Backflow Preventers. Repair Kit components include everything you need for simple, hassle-free repairs, saving you valuable time and labor costs. The Zurn Wilkins portfolio offers long-lasting protection from backsiphonage and backpressure of contaminated water into the potable water supply.