Water Heater Pressure Relief Valve Extension Pipe

Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap.

Water heater pressure relief valve extension pipe.

I explain that it was routed to a drain to prevent a mess if it discharges but that you would want to see water on the floor if it was dripping or pressure had blown off so that you know. For more on this. 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. If the tpr valve is on top of the water heater install a short piece of cpvc from the valve to the side of the water heater then use a 90 degree fitting to make the turn towards the floor and add a second pipe to carry the discharge down to the catch pan.

In the example below an upper pressure relief valve drain not visible behind vent connector has been tied into the drain for the lower one. The discharge drain extension is typically taken to just a few inches above the floor or in some jurisdictions it may be directed outdoors a solution that i think is risky. The pipe must be no more than 6 from the floor to prevent a scalding injury should the valve open. Discharge through an air gap located in the same room as the water heater.

Cut lengths of cpvc pipe to match the ones you re replacing as long as they extend to within 3 inches of the floor. Go to our blog post when is a water heater drain pan required. Most pressure relief valves have a 3 4 threaded discharge port. The temperature steam rating of a combination temperature and pressure relief valve or valves shall equal or exceed the energy input rating in btu per hour of the water heater.

The pressure relief valve extension is plastic and has a couple of elbows leading it to a drain. Use a 3 4 male iron pipe mip adapter thread it into the prv and carry on with the rest of your pipe. Connect the pipe and elbow to the pressure relief valve. The temperature pressure relief valve on a water heater is connected to a drain line so that if the valve opens someone nearby is not shot in the face with hot water.

The water heater s temperature pressure relief valve tprv discharge pipe is too short. Pan serving the water heater. Another common issue issue identified by our inspectors. No shut off valve or other restricting device may be installed between the water heater or storage tank and the combination temperature and pressure relief valve.

4 termination of the discharge piping can be to any of the following. You can not reduce the size of the pipe coming from the prv. There should be nothing between the pressure relief valve and the water heater. The water heater s temperature pressure relief valve tprv extension pipe is routed upwards.

Serve a single relief device and shall not. Not be directly connected to the drainage system. Connect the relief valve to the opening in the water heater with a pipe wrench or an adjustable wrench. Measure the distance from the relief valve to the floor.