- New
RF840 is a Valterra straight fresh-water adapter with a 3/8" male NPT connection and a 1/2" hose barb. Made of black polypropylene, it is designed to connect compatible components in RV fresh-water plumbing systems. The threaded end fits a 3/8" female pipe-thread connection, while the barbed end is designed for a 1/2" inside-diameter hose and should be secured with a hose clamp. This fitting is suitable for compatible RV water-line repairs and installations.