JG White Twist-to-Lock fittings not only provide users with quick and easy installation & disconnection purposes, but also provide them with extra security due to the John Guest Twist-to-Lock technology. Manufactured from high quality engineered plastic with EPDM O-Rings, the fittings do not require any tools to make leak-proof connections proving to be both cost & time effective. Available for immediate sale, the range is available in 3/8", 1/2", 3/4" and 1" CTS sizes. In addition, the range is also NSF and IAPMO approved for domestic plumbing in the U.S. and Canada and carry a 25 year warranty against defects in materials or manufacturing.