Rubber Repair Kit 2-1 2 and 3 350 375 450 475 and 475

The Rubber Repair Kit is compatible with both the 2-1/2" and 3" Model 350 and 450 Double Check Backflow Preventers. Repair Kit components conveniently include two Seat O-Rings, two Stem O-Rings, and two Seal Rings. Repair Kits are sold as accessories for quick and simple repair needs, providing long-lasting protection from backsiphonage and backpressure of polluted water into the water supply while saving you valuable time and repair costs.