Watts SD3 Backflow Preventer Repair Kit – Replacement Parts for 3/8" Check Valve with StrainerRestore performance and extend the life of your Watts SD3 backflow preventer with this genuine repair kit. Designed specifically for the SD3 model, this kit includes all the essential internal components needed to rebuild and reseal your check valve with strainer. Perfect for beverage systems, draft lines, and soda applications, the repair kit ensures continued protection against reverse flow and contamination without the need to replace the entire