Hot Water Heater Vacuum Relief Valve

Place a bucket under the discharge pipe connected to the valve to collect any water and open the t p valve.

Hot water heater vacuum relief valve. A number of local. It works by preventing internal vacuum conditions that could result in burned out heaters and or collapsed storage tanks. There are the atmospheric vacuum breakers and the pressure vacuum breakers. The vacuum relief valve shall be ansi z21 22 rated and csa certified.

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. A vacuum relief valve does in fact break vacuum but is more used in the line of letting air in so the hot water tank can be drained for service like for heating element replacements etc. They have a brass body construction with npt male inlet connection and a protective cap. A vacuum valve must be installed on the cold water inlet in either a vertical or horizontal position to assure warranty coverage a marathon water heater.

Product information technical details. Open the drain valve on the water heater then open the hot water tap at a nearby sink to release the vacuum on the tank. It is especially well suited for many domestic and commercial systems. The vacuum relief valve shall have an all brass body and include a protective cap.

The vr20 vacuum relief valve is designed to protect hot water supply systems and pressure vessels against negative pressure. 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. Water heater vacuum relief valve author. When no water exits the discharge pipe from the t p valve close the drain valve and remove the garden hose.

It s recommended can t remember by whom that bottom supplied water heaters which obviously have no installed dip tube have a vacuum relief valve installed no matter the location of the water heater. 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.