The ¾” Complete Repair Kit is a full internal rebuild solution for Zurn double check valve assemblies (model 350 and 350 XL). Designed to replace all internal components, this kit restores proper sealing, spring tension, and valve operation, ensuring reliable backflow prevention. Ideal for scheduled maintenance or repairs after freeze damage, it helps maintain compliance with industry standards while extending the life of the assembly. Durable and comprehensive, it provides all essential parts for a complete rebuild in one convenient kit.