Water Heater Safety Valve Discharge Pipe

The valve should be connected to a discharge pipe also called a drain line that runs down the length of the water heater tank.

Water heater safety valve discharge pipe. If the pressure in the tank exceeds 150 psi or the temperature exceeds 210 degrees fahrenheit the tpr valve opens to release the pressure. 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. Not be directly connected to the drainage system.

The purpose of this drain line is to discharge potentially hot scalding water to a safe location so that a bystander is not scalded. 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. In the first case the valve will drain water out of the discharge pipe as explained above. Building codes require temperature pressure relief tpr valves with discharge pipes on all new water heater installations.

Instead it is attached with a discharge pipe link with hot water heater. Either the valve was triggered to open because of excessive temperature or pressure or the valve itself is faulty. The problems occur in the pipe between the valve and the discharge point. 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.

The tprvs themselves are not usually a problem on water heater installations as they come installed in the water heater. This pipe is responsible for routing hot water released from the tpr to a proper discharge location. Discharge through an air gap located in the same room as the water heater. This temperature pressure relief valve is not directly attach with the hot water pressure heater.

In most of the disasters caused by hot water heater pipe leaking from the top the trp valve is involved. Scalding water and steam escape the tank through the valve and tube to relieve the pressure. The irc provides a list of 14 specific criteria meant to keep this pipe open. You may have an issues with the hot water coming out of overflow pipe.

The discharge piping serving a pressure relief valve temperature relief valve or combination valve shall. Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap. This pipe is responsible for routing hot water released from the tpr to a proper discharge location.