- New
28849 is an Elkhart EcoPoly swivel adapter designed for compatible fresh-water plumbing systems in RVs and trailers. It connects 3/4-inch PEX tubing to a 3/4-inch female pipe-thread connection with a swivel nut, helping simplify installation where a rotating connection is useful. This straight adapter is made of black plastic and is sold individually. Verify the pipe thread type and tubing compatibility before installation.