Water Heater Vacuum Relief Valve Installation

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.

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. This is especially crucial for cast iron valves. Tempering valves can be installed anywhere they are needed. The vacuum relief valve is installed at the highest point in the system.

The vacuum relief valve shall have an all brass body and include a protective cap. 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. Wrap the threads of the new tpr valve with plumber s tape or apply joint compound liberally. Mount prvs in a vertical position which means upright and with the spindle vertical.

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. In all cases air entry is required to enable the system to reach an equilibrium. They have a brass body construction with npt male inlet connection and a protective cap. 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.

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. For flanged valves be sure to draw the bolts down evenly. 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. Understanding water heater installation code requirements can be a real pain.

A valve installed in any position other than vertical might not perform correctly. Screw the valve into the tank until it is hand tight and then use a wrench to tighten it until the outlet is facing towards the overflow drain pipe. Reconnect the drain pipe. Directly above the vertical line that feeds the tank my hot water tank is under the.

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. The vacuum relief valve shall be ansi z21 22 rated and csa certified.