Watts Quick Connect 1/4 in. Plastic O.D. x O.D. Coupling

"This 1/4 inch OD AquaLock mini coupling works with polyethylene, PEX, or soft copper tubing. It is easy to install, no tools or tube inserts are required. The fitting can be used for hot and cold water applications. The unique O-ring guide feature provides a zero-leak connection. Unlike barb fittings, this fitting joins the tubing on the outside, increasing the flow capacity. After a connection has been made even under maximum pressure, the tubing is able to swivel, making the fitting ideal for vibrating and dynamic applications. Lock it Down - Whether you're working with PEX, Copper, or CPVC, AquaLock has you covered with a stainless steel gripper ring that is resistant to corrosion and interlocks with multiple materials without any tools. Those who know best know when you need a connection you can count on... AquaLock it down."