2PCS 3/8"" 8mm Non Return One Way Fuel Line Check Valve, Aluminium Alloy One-Way About this item ?Non-return Check Valve? :You will receive 2 fuel check valves, 10mm(3/8 ") in size, the working temperature range from -30 C to 130 C, opening pressure: 0.2 bar(2.9psi), working pressure range is 2.9-87 psi (0.2-6bar). ?High-Quality Material? :The fuel check valve is made of aluminum alloy material, the surface anodized treatment, sturdy, corrosion, stable and reliable performance, and long service life. ?Function? :This fuel check valve has a one-way check valve design that prevents fuel from flowing back into the tank and keeps fuel in the line while the engine rests. ?Easy to Install? :This fuel check valve is easy to install. The valve is marked with an arrow to show the direction of fluid flow. Connect the fuel line in the direction of the arrow. You can also use some hose clamps to secure the connection. ?Wide Application? :This fuel line one-way check valve can be installed in cars, ships, motorcycles, lawnmowers, and other fuel systems, suitable for water, gasoline, diesel, oil, and other fluids. But it doesn't apply to methanol.