Water Heater Discharge Pipe Pvc

The wrong type of plastic pipe can create a big problem.

Water heater discharge pipe pvc. Be constructed of an approved material such as cpvc copper polyethylene galvanized steel polypropylene or stainless steel. Here s the quick rundown. Yes part of the video i have the camera between my teeth lol you ca. You may have an issues with the hot water coming out of overflow pipe.

Tpr valve discharge tube opening is wet. Pvc is a thermoplastic and therefore at some point it will begin to degrade and break down as it s heated up. This is one of the most common questions people ask about using pvc pipe. Some jurisdictions require a metal pipe which usually is copper.

Some installations however use plastic pipe. If the temperature and pressure relief tpr valve opens because the water heater is overheating the water will be over 200º f. Water heater basic plumbing. Can i use pvc for hot water.

A discharge pipe should. It just so happens that schedule 40 pvc s maximum operating temperature is 140 degrees fahrenheit around the same temperature that hot water gets to in most homes. This is a very simple video on how to replace add a discharge pipe on a water heater. 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.

The most common diyer choice for plastic pipe is pvc. 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. In most of the disasters caused by hot water heater pipe leaking from the top the trp valve is involved. Pvc pipe is not rated by the building code for use with hot water so the installation shown above is wrong and unsafe.

If there is corrosion on the end of the discharge tube or if you see drip stains on the floor below the drain pipe even if the floor is dry you should always test for active or recent spillage at the relief valve. Instead it is attached with a discharge pipe link with hot water heater. 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. This will cause the pvc pipe to first deform and then collapse which constricts the flow and defeats the purpose of allowing the overheated and over pressurized water to flow quickly out of the tank and prevent a tank explosion.