Sump pump check valve. Clear PVC sump pump check valve allows for easy inspection of basement water flow and valve operation. Full flow design with quite offset flapper prevents backflow for maximum pumping capacity. Design contributes to less frequent sump pump cycling prolonging the life of the motor. Ideal for new installation or as a replacement for virtually any sump pump and basement water drainage application. 1 1/2" diameter pvc piping. 

View check valve brochure:  Check Valve Brochure