Amazon.com : Hayward TC10150STE 1-1/2-Inch PVC TC Series True Union Check Valve with EPDM Seals and Socket/Threaded End Connection : Swimming Pool Filter Valves : Patio, Lawn & Garden
Era Made in China PVC True Union Ball Check Valve Pn10 (F1970) with NSF-Pw & Upc - China Manufacturing, Plastic Check Valve
PVC plastic swing and spring check valves, quiet & corrosion resistant
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HYDROSEAL Sharkfellow 1'' PVC True Union Ball Check Valve with Full Port, ASTM F1970, with EPDM Seals, Corrosion-Free, Service Free, Rated at 200 PSI @73F, Gray, 1 inch Socket (1''): Amazon.com: Industrial
Hayward PVC 1/2" S/T True Union Ball Check Valve
1" PVC True Union Ball Check Valve, Gray, EPDM, Socket and Threaded, 8010GST
1/2" PVC True Union Ball Check Valve (S x S) SK-TUBC-S-005