3″ Tank to Pump Check Valve Casting for 6″ Pipe 500205-6 In Stock Part No. 500205-6 Quickly add a tank to pump check valve to 6″ pipe. Requires (1) 500019 3″ Clapper Casting and (2) 500021 Stainless Steel Bushings. Description 3" Tank to Pump Check Valve Casting for 6" Pipe Download Part Drawing Material Stainless Steel In stock