As water heaters age the inside tanks that contain water can weaken from rust and corrosion.
Water heater pop off valve drain line.
Discharge tubes connect to the temperature and pressure relief valve to direct any water released away from the water heater and into a drain.
Temperature and pressure relief valves shall be installed so that the sensing element of the valve extends into the heater tank and monitors the.
Sometimes called a pop off valve opens to.
The valve should be connected to a discharge pipe also called a drain line that runs down the length of the water heater tank.
Helps guard against accidental flooding and expensive repair.
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.
It s rare that a hot water heater re.
The fittings on the pipes above the water heater the drain valve near the bottom of the tank the one with the standard garden hose connection and.
Installing a drain line for a hot water heater pan.
The temperature pressure relief valve or tpr valve on any heated appliance that contains water such as a heating boiler hot water tank water heater water cylinder must have a drain line or discharge tube properly installed routed and made of proper materials.
All pressurized non storage type water heaters shall be provided with a pressure relief valve installed at the hot water outlet with no shut off valve between the heater and the relief valve.
Top mount runoff tubes are recommend when the temperature and pressure relief valve is located on the side of the water heater.
If the water heater thermostat fails to turn off at its temperature setting and continues to heat the water indefinitely the tpr valve will open and let the overheated water out.
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This causes the tanks to leak and in some cases.