1Function: The basic design of the one way check valve can inhibit backflow in a line. The arrowhead marked on the valve shows the direction of fluid flow, preventing fuel from returning to the tank and keeping it in the line. 2Characteristic: The push lock design of the connector prevents the hose from slipping off and is easy to connect. The surface is anodized, the appearance is beautiful, and the thread strength is outstanding. 3Application: One way check valves can be installed in many diesel, biofuel systems, carburetors, and low pressure fuel systems where you desire fuel flows in only one way. Suitable for water, gasoline, diesel, oil and other fluids. 4Premium Material: The nonreturn check valve body is made of high?quality aluminum alloy and has a longer service life than plastic. Stable characteristics and high reliability. 5Easy to Install: Connect the fuel line according to the small arrowhead on the valve. You can use some hose clamps to ensure that the pipe does not fall off. The design is simple and easy to operate.