Water Heater Safety Valve Discharge Pipe

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.

Water heater safety valve discharge pipe.

In most of the disasters caused by hot water heater pipe leaking from the top the trp valve is involved. 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 discharge piping serving a pressure relief valve temperature relief valve or combination valve shall. Your water heater s relief valve can start leaking for one of two reasons.

The valve should be connected to a discharge pipe also called a drain line that runs down the length of the water heater tank. The purpose of this drain line is to discharge potentially hot scalding water to a safe location so that a bystander is not scalded. This pipe is responsible for routing hot water released from the tpr to a proper discharge location. Temperature pressure relief valve discharge tubes drain lines their piping.

In the first case the valve will drain water out of the discharge pipe as explained above. Instead it is attached with a discharge pipe link with hot water heater. The valve should be connected to a discharge pipe also called a drain line that runs down the length of the water heater tank. This pipe is responsible for routing hot water released from the tpr to a proper discharge location.

Either the valve was triggered to open because of excessive temperature or pressure or the valve itself is faulty. Scalding water and steam escape the tank through the valve and tube to relieve the pressure. The tprvs themselves are not usually a problem on water heater installations as they come installed in the water heater. Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap.

The irc provides a list of 14 specific criteria meant to keep this pipe open. The problems occur in the pipe between the valve and the discharge point. Not be directly connected to the drainage system. You may have an issues with the hot water coming out of overflow pipe.

Discharge through an air gap located in the same room as the water heater. If the pressure in the tank exceeds 150 psi or the temperature exceeds 210 degrees fahrenheit the tpr valve opens to release 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.