Best Check Valves

EVIL ENERGY 3/8" Fuel Check Valve One Way Inline Non Return Diesel Gasoline Black(10mm OD,2PCS)

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

Merrill MFG CVNL100 1" No-Lead Brass Check Valve 700 Series, 1"

Zoeller 30-0181 PVC Plastic Check Valve, 1-1/2 Inch

Watts 9D Series 3/4" Brass Dual Check Valve Backflow Preventer, Union Female NPT Inlet x Female NPT Outlet, Intermediate Atmospheric Vent, Compact Design, Vertical or Horizontal Install

Superior Pump 99555 Universal Check Valve, Plastic, Fits all 1-1/4-Inch or 1-1/2-Inch MIP or FIP, Black (Pack of 1)

EZ-FLO Brass In-Line Check Valve, 3/4 Inch IPS, Stainless Steel Spring, 20403LF

FibroPool Swimming Pool Check Valve - 2 Inch - 2 Way - Positive Seal & Non Lube Replacement Valve for Pools and Spas

Jandy 7305 180-Degree, 2-Inch to 2-1/2-Inch Check Valve

10 Pack 1/4 inch Plastic Check Valve, One Way Barb Hose Inline Non Return For Fuel, Oil, Water, Air (1/4 inch)