- New
28823 is an Elkhart EcoPoly reducing tee designed to connect compatible PEX tubing in fresh-water plumbing systems. It features 1/2-inch PEX x 1/2-inch PEX x 3/4-inch PEX connections, allowing a 3/4-inch line to branch into two 1/2-inch PEX lines. The black plastic fitting is suitable for compatible RV, trailer and other plumbing applications.