Vacuum Relief Valve Water Heater Diagram

Looks like the vacuum relief valve should be replaced every 5 7 years.

Vacuum relief valve water heater diagram.

These valves are suitable for low pressure steam and water service and are ideal for use in water heaters and. They have a brass body construction with npt male inlet connection and a protective cap. The valves prevent the build up of negative pressure which can unbalance the system or damage the storage vessel. Relieves negative pressure from inside the tank.

The vr20 vacuum relief valve is designed to protect hot water supply systems and pressure vessels against negative pressure. These valves are specifically designed for tank protection. Replacement for the failed original valve on my marathon water heater. Direct replacement for rheem ruud and richmond water heaters.

The vacuum relief valve shall have an all brass body and include a protective cap. A watts model n36 m1 vacuum relief valve shall be installed on domestic hot water supply tanks heaters unit heaters steam kettles as indicated on plans. Rheem protech vacuum relief valves feature true oem performance. Direct replacement for rheem marathon water heaters.

It works by preventing internal vacuum conditions that could result in burned out heaters and or collapsed storage tanks. Series n36 water service vacuum relief valves are used in water heater tank applications to automatically allow air to enter into the piping system to prevent vacuum conditions that could siphon the water from the system and damage water heater tank equipment. It is especially well suited for many domestic and commercial systems. The vacuum relief valve shall be ansi z21 22 rated and csa certified.

These valves are specifically designed for tank protection. Nowhere does the owner s manual say this. Vacuum relief valves are used in water heater tank applications to automatically allow air to enter into the piping system to prevent vacuum conditions that could siphon the water from the system and damage water heater tank equipment.