The Watts Aqualock 1/2 In. OD PEX Quick Connect Pipe Union, a white plastic fitting with a maximum working pressure of 150 psi, seamlessly connects two pieces of 1/2-inch OD PEX tubing. This versatile union features corrosion-resistant stainless steel gripping teeth, allowing easy interconnection with multiple materials without specialized tools or tube inserts. Even under maximum pressure, the connected tubing retains swivel flexibility. Designed for poly or soft copper tubing, it's not suitable for steel or concealed installations.