- New
RF855 is a Valterra straight coupler with 3/8" barbed connections on both ends. Made of black plastic, it is designed for compatible RV fresh-water plumbing applications and connects two sections of 3/8" tubing or hose. A hose clamp can be used to help secure the connection. This fitting is suitable for repairs or new freshwater line installations where the 3/8" barb configuration is required.