Water Heater Vacuum Relief Valve Installation

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 installation.

Mount prvs in a vertical position which means upright and with the spindle vertical. 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. Reconnect the drain pipe. Directly above the vertical line that feeds the tank my hot water tank is under the.

T p valve the temperature and pressure relief valve is an important safety device which goes off when your tank exceeds 210 degrees fahrenheit or 150 psi. With a bottom supply tank nothing except a check valve is going to keep the water in the tank once a hot water faucet is opened so air can break the vacuum in the tank. A valve installed in any position other than vertical might not perform correctly. 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.

Uma solar vacuum relief valve. 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. This is especially crucial for cast iron valves. Hot in on one side cold in on the other and the tempered water out of the center to the system.

The vacuum relief valve shall be ansi z21 22 rated and csa certified. Wrap the threads of the new tpr valve with plumber s tape or apply joint compound liberally. Tempering valves can be installed anywhere they are needed. The vacuum relief valve is installed at the highest point in the system.

These valves are suitable for low pressure steam and water service and are ideal for use in water heaters and supply tanks table top heaters jacketed steam kettles unit heaters low pressure steam systems and steam coil heaters. They have a brass body construction with npt male inlet connection and a protective cap. For flanged valves be sure to draw the bolts down evenly. 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.

Understanding water heater installation code requirements can be a real pain. In all cases air entry is required to enable the system to reach an equilibrium. Valve the purpose of a vacuum relief valve is to keep the water in the tank and prevent siphonage.