【Practical Check Valve】The one-way check valve is marked with an arrow, indicating the direction of fluid flow, preventing fuel from flowing back to the tank and remaining in the pipeline. 【Superior Material】The diesel fuel valve is made of aluminum alloy material, the service life of aluminum alloy is longer than plastic material. Good workmanship, corrosion resistant and durable. 【Advantage of Fuel Valve】 The fuel check valve perfectly solves the problem of difficult or slow starting of the vehicle due to fuel passing through the pipeline. 【Good Compatibility】 The aluminum fuel valve is compatible with water, gasoline, diesel, engine oil and other liquids and is suitable for the fuel systems of automobiles, ships, helicopters, motorcycles, etc. 【Range of Use】 The fuel check valve is ideal for carburetor and low-pressure fuel systems. Also suitable for hydraulic pumps and galley pumps that are not self-priming.