This polypropylene shut-off valve has high chemical resistance and is made of excellent quality material which is safe, non-toxic, and perfect to use in water purification system. The push-fit technology allows users to connect and disconnect tubes effortlessly without any tool. The quarter-turn lever makes an easy water supply shut-off. The EPDM seals at the connections effectively prevent leakage. It can be used on APEC TANK-3, TANK-4, or any other standard 3-4 gallon water filtration tanks with 1/4" NPTF and 1/4" output.