Pentair FP0026-6D-P2 Parts 2o Sump Pump Check Valve Manufactured in China Easy to use Highly durable Fits sump pumps with 1-Inch to 14-Inch discharge Prevents water in discharge line from draining back in sump when pump is not running Flapper type valve requires minimal unseat pressure May be plumbed with accordion sump discharge hose, polyethylene PVC, or galvanized pipe Complete installation instructions included