- New
16910 by Elkhart Supply is a three-way water heater bypass valve designed for compatible recreational vehicle plumbing systems. It allows water to flow through the water heater or bypass it when needed, including during winterization. Made of plastic, the valve features three 1/2-inch PEX connections and an integrated operating handle for convenient flow control. It is suitable for replacing a compatible bypass valve in an RV fresh-water system. Check your existing fittings and plumbing configuration before ordering.