- PEX wall support brackets provide rigid, straight-through support for 1 /2 in or 3 /4 in Uponor AquaPEX tubing and 1 /2 in copper stubs. It features fixed, 2 in on-center spacing, and allows the 1 /2 in plastic bend support (A5250500) to snap into place for 1 /2 in Uponor AquaPEX tubing as it exits a wall.