Hot Water Heater Pressure Relief Valve Discharge Pipe Installation

A trapped tpr dischage pipe is a common defect when a replacement water heater s tpr valve is lower than the original one and the installer connects to the exisitng discharge piping at the wall.

Hot water heater pressure relief valve discharge pipe installation.

Whether you re installing a new indoor or outdoor tankless water heater or replacing a pressure release valve include a length of pvc pipe as a discharge line. Every relief valve which is designed to discharge water or steam shall be connected to a discharge pipe. Thread the tpr valve clockwise into the pressure relief fitting on the water heater and tighten it by hand until it is tight. Verify the proper valve is installed the tprv on a water heater is set to discharge at 150 psi or 210 fahrenheit.

Not be directly connected to the drainage system. The valve should be connected to a discharge pipe also called a drain line that runs down the length of the water heater tank. For flanged valves be sure to draw the bolts down evenly. This is especially crucial for cast iron valves.

It s designed to release the pressure when there is too much of a load built up inside the water heater. Mount prvs in a vertical position which means upright and with the spindle vertical. The discharge piping serving a pressure relief valve temperature relief valve or combination valve shall. This is a very simple video on how to replace add a discharge pipe on a water heater.

Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap. This temperature pressure relief valve is attached to the discharge pipe. Yes part of the video i have the camera between my teeth lol you ca. 8 termination of the tpr drain pipe cannot be more than 6 inches or less than two pipe diameters above the floor ground or waster receptor flood rim level.

These numbers will be printed right on the valve or on a tag attached to the. Discharge through an air gap located in the same room as the water heater. The tpr valve will activate if either water temperature measured in degrees fahrenheit or pressure measured in pounds per square inch psi exceed safe levels. So this release of its pressure causes your hot water tank overflow pipe dripping towards the floor where the hot water heater is placed.

A valve installed in any position other than vertical might not perform correctly. Pressure relief valve installation mounting.