SPD V2 is the latest non return check valve. These valves comes with a completely new design that is different from all others on the market where the check valve is completely tight and can withstand very high pressure and counterpressure. These valves are specifically designed to handle fuel, air, oil, water and ethanol. The check valve is designed to handle the agressive fuel ethanol as internal components have been adapted for this. This is a full-flow construction that does not limit the flow. Full-flow check valve. Can be used for fuel, oil, water and air system. Thread: AN10 on both sides This check valve does not limit flow. The opening pressure is about 0.04 bar