The John Guest Union Tee makes connecting OD tubing quick and easy. Fittings are manufactured in acetal with food grade nitrile O-ring, making them especially suitable for applications involving food and beverage and potable liquids. They are also suitable for air and inert gases and can be used on CO2 /nitrogen beverage gas lines, pneumatics, vacuum as well as other applications. Features and benefits: For use with plastic or copper OD size tubing Acetal body, nitrile O-ring Quick and easy connection/disconnection Food Quality, suitable for potable liquids and pure water NSF51 and NSF61 listed Lead free materials Can be used for air/pneumatic and vacuum applications Suitable for inert gases, CO2 and nitrogen beverage lines Working pressure and temperature: 230 psi at 68° F 150 psi at 150° F