2-1/2 in First Check Repair Kit for Double Check Valve Assembly, Black

SPECIAL ORDER ITEM. Review Returns Policy before purchase. Maintain the integrity of Series 757 backflow preventers with this first check repair kit. Designed for 2-1/2 in to 4 in double check valve assemblies and double check detector assemblies, this kit provides the essential components to restore proper check valve function. The package includes a first check module, a check module O-ring, and a red silicone disc elastomer. This kit is engineered specifically for the 757 and 757DCDA models to ensure precise fitment and reliable operation within the valve assembly. Backed by a 1-year manufacturer warranty, these components allow for the replacement of worn internal parts to keep plumbing systems compliant and operational.