JEGS Fuel Sampling Valve is the professional way to meet the requirements imposed by various racing associations' requirements for fuel testing. No longer do you need to loosen fuel line fittings to provide a specimen and fear the potentional risk of fire. Simply install the valve after the fuel pressure regulator using either the 1/8" NPT or -06AN model. Now with the press of a "button" fuel flows out the drain spout into your receptacle, ready for analysis and you go on to the next round. Manufactured from aircraft grade aluminum and anodized for long lasting use.