Must be worked on the 50 gallon tank and with air compressor. Used to dispense non-corrosive liquid from 50 gallon tank. Provided with fluid outlet valve to control steadily. Designed with air pressure regulator and gauge which can easily control the pressure. 【Genuine Guarantee】We provide you with quality assurance tools with 12 months of after-sales warranty support. Help you to achieve a satisfactory shopping experience.