5420-040 | 4 PVC BUTTERFLY CHECK VALVE WAFER EPDM | (PG:289) Spears Additional Information_4500 psi Non-Adjustable; 0.140 lb Weight 4X2 PVC MECH VENT ASSEMBLY

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5420-040 | 4 PVC BUTTERFLY CHECK VALVE WAFER EPDM | (PG:289) Spears Additional Information_4500 psi Non-Adjustable; 0.140 lb Weight 4X2 PVC MECH VENT ASSEMBLY4 PVC BUTTERFLY CHECK VALVE WAFER EPDM Description Spears multi purpose Butterfly Check Valves provide an extremely low profile and very quick response to back flow without slamming. Since most all components are internal, Spears Butterfly Check Valves require no more space than a piece of pipe and fitting. Special design incorporates flexible reinforced elastomer seal for long life and is suitable for mounting in any position for greater versatility.