Water Heater Vacuum Relief Valve Installation

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.

Water heater vacuum relief valve installation.

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 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. 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. For flanged valves be sure to draw the bolts down evenly.

A valve installed in any position other than vertical might not perform correctly. The vacuum relief valve shall have an all brass body and include a protective cap. 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. Tempering valves can be installed anywhere they are needed.

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. Uma solar vacuum relief valve. This is especially crucial for cast iron valves. They have a brass body construction with npt male inlet connection and a protective cap.

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. Violating these codes may result in fines voiding your warranty or putting your family at risk. Wrap the threads of the new tpr valve with plumber s tape or apply joint compound liberally.

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 is installed at the highest point in the system. Mount prvs in a vertical position which means upright and with the spindle vertical. The vacuum relief valve shall be ansi z21 22 rated and csa certified.

Directly above the vertical line that feeds the tank my hot water tank is under the. 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. Reconnect the drain pipe.