The double check valve allows for faster flow, while the two-way check valve is user-friendly and expedites oil output. Crafted from premium materials, it is long-lasting and resistant to oil and aging. Following fuel filter replacement, prime fuel to the fuel pump. Designed for unidirectional flow, it is suitable for transporting gasoline, diesel, engine oil, water, and more. A straightforward and efficient tool for refueling diesel engines in automobiles, motorcycles, and boats.
