- New
28845 is an Elkhart EcoPoly reducing coupler designed to connect 3/4" PEX tubing to 1/2" PEX tubing in compatible fresh-water plumbing systems. This straight adapter is identified as a black plastic fitting and is intended for RV plumbing applications. It provides a practical transition between two different PEX tubing sizes. Verify the tubing dimensions and connection requirements before installation.