The Pressure Vacuum Breaker Repair Kit is compatible with the 1/2 in, 3/4 in, and 1 in Model 720A Pressure Vacuum Breaker Assemblies. Repair Kit components come packaged with everything you need for easy repairs, including Bonnet Washer, Bonnet O-Ring, Load Nut and Guide, Load Washer, Upper Disc, Poppet, Spring, Spider Screw, Lower Disc, Guide Spider and Hex Nut. Repair Kits are sold as accessories for quick and simple repair needs, providing long-lasting protection from backsiphonage of contaminated water into the potable water supply.