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
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PVC/EPDM TANK ADPT 4" S X T - 7001.040
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6" PVC to PVC / Cast Iron EPDM to Cast Iron EPDM Flex Coupling