Ball and Seat Stainless Steel Check Valve Kit for Prep 300 (3/16 Inch)

Ball and Seat Stainless Steel Check Valve Kit for Prep 300 (3/16 Inch).  Includes check valve capsules, inlet check valve holder (default port configuration), outlet check valve holder (default port configuration), and replacement instructions (1 check valve kit per pump head; 2 kits required for dual-head pumps).