Best Check Valves

Superior Pump 99555 Universal Check Valve; fits all: 1-1/4" and 1-1/2" MPT and FPT , Black

PumpSpy Silent Check Valve - 1-1/2" with Buna-N Couplings, Model CV-150, Spring-Loaded Flapper, Sump Pump Life Expectancy Increase, Includes Steel Clamps Fit 1-1/2″ Pipe

1-1/2" Silent Check Valve - CV150,Visual Sump Pump Check Valve with Buna-N Couplings & Steel Clamps - Spring Loaded Flapper for Backflow Prevention,Reduces Water Hammer Effect

SharkBite Max 3/4 Inch Check Valve, Push to Connect Brass Plumbing Fitting, PEX Pipe, Copper, CPVC, PE-RT, HDPE, UR2016A

SharkBite Max 1/2 Inch Check Valve, Push to Connect Brass Plumbing Fitting, PEX Pipe, Copper, CPVC, PE-RT, HDPE, UR2008A

1.5" PVC Quiet Union Check Valve

Valterra 200-CU15 PVC Swing/Spring Combination Check Valve, Clear, 1-1/2" Union

BE-TOOL Spring Check Valve 1" 30mm Brass Check Valve Non Return Single Check Valve for Water, Oil, Steam and Other Media (Pack of 1)

Quickun 1/2" Barb Hose One Way Inline Check Valve Non Return Ozone Resistance PVDF Plastic One-Way Fuel Oil Water Gas Pump Air Check Valve, 2 Pcs

Feelers 1/2" One Way Inline Check Valve Non-Return One-Way Air Water Gas Check Valve Ozone Resistance PVDF, Pack of 4