The Wilkins RK1-720A is a complete repair kit for the 1/2” - 2” 720A series pressure vacuum breakers. It includes an O-ring, a plastic washer, a spring, and a poppet spider assembly. Zurn's main project is to help conserve and minimize the cost of materials. It produces tools known to perform well and can last for a while. So grab on this opportunity and purchase this Wilkins RK1-720A complete repair kit only here at PlumbersStock! Have time to spare? Feel free to browse other products that we offer.