Water Heater Safety Valve Discharge Pipe

This pipe is responsible for routing hot water released from the tpr to a proper discharge location.

Water heater safety valve discharge pipe.

Discharge through an air gap located in the same room as the water heater. The tprvs themselves are not usually a problem on water heater installations as they come installed in the water heater. 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. Building codes require temperature pressure relief tpr valves with discharge pipes on all new water heater installations.

The discharge piping serving a pressure relief valve temperature relief valve or combination valve shall. The problems occur in the pipe between the valve and the discharge point. Scalding water and steam escape the tank through the valve and tube to relieve the pressure. 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.

Either the valve was triggered to open because of excessive temperature or pressure or the valve itself is faulty. Instead it is attached with a discharge pipe link with hot water heater. In most of the disasters caused by hot water heater pipe leaking from the top the trp valve is involved. The purpose of this drain line is to discharge potentially hot scalding water to a safe location so that a bystander is not scalded.

Not be directly connected to the drainage system. Your water heater s relief valve can start leaking for one of two reasons. You may have an issues with the hot water coming out of overflow pipe. If you look a little deeper in the manufacturer s installation instructions several state if the home is to be installed on a basement or enclosed crawlspace install the drain pipe connecting the discharge from the water heater temperature and pressure relief valve to the outside or to a sump.

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. The valve should be connected to a discharge pipe also called a drain line that runs down the length of the water heater tank. Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap. If the pressure in the tank exceeds 150 psi or the temperature exceeds 210 degrees fahrenheit the tpr valve opens to release the pressure.

In the first case the valve will drain water out of the discharge pipe as explained above. The irc provides a list of 14 specific criteria meant to keep this pipe open. Temperature pressure relief valve discharge tubes drain lines their piping.