Water Heater Vacuum Relief Valve Installation

Open t p valve to help relieve vacuum in tank.

Water heater vacuum relief valve installation.

It may be in the box or you may need to buy your own. The t p valve automatically opens if the temperature or pressure becomes too high for the tank. Do not reuse the old valve. 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.

Leaving the power or gas on when the tank has been partially drained can cause serious damages or injuries. Before doing any work on a water heater you should always turn off the circuit breaker or set the gas control valve to the pilot setting. With the power or gas off and the water off and drained below the relief valve remove the drain pipe from the relief valve if it does not have a drain pipe on it be sure to install one on the new relief valve. 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.

3 install or locate this water heater only in accordance with the provided installation. 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. Locate the water heater drain and pressure relief valve and allow all water to drain from water. Turn off the cold water inlet valve.

I purchased a vacuum relief valve and the installation instructions that came with it states that it should be installed on a horizontal line above an elbow. Drain tank by fully opening drain valve. See item 2 in exploded view. The vacuum relief valve shall be ansi z21 22 rated and csa certified.

They have a brass body construction with npt male inlet connection and a protective cap. These valves are suitable for low pressure steam and water service and are ideal for use in water heaters and. Directly above the vertical line that feeds the tank my hot water tank is under the. In order to gain occupancy an inspector informed me that i need to install a vacuum relief valve on the cold water supply line for my hot water tank.

Prepare the water heater for repairs. It needs to be the same size as the outlet of the relief valve and co to about 6 inches from the floor without any possible way of. If your water heater did not come with a new t p relief valve pre installed simply twist in the new valve now.