John Guest Acetal Copolymer Tube Fitting, Tap Adaptor, 1/4" Tube OD x 7/16"-24 UNS (Pack of 10) Tap adapter extends a run of piping by joining two pipes of different types Push-to-connect fitting connects to pipes or tubing on one end and has a UNS male connector on the other Made of acetal copolymer plastic for low moisture absorption and high tensile and flexural strength Working pressure of up to 150 psi Meets NSF/ANSI standards 14, 51, and 61 for quality assurance