No, a water heater will continue to heat the water with a bad TPR valve. A failed TPR valve is a safety issue since the water heater could heat the water to the point that the tank explodes and does significant damage to your home, roof, and probably the home of your neighbors.

What happens if pressure relief valve fails?

Shut Down the System When a Valve is Leaking

Leaking pressure relief valves can’t regulate the overall pressure within the pipelines. This can cause overpressure conditions, which can lead to system failure and, in some cases, system explosions and fires.

What is the purpose of the TPR valve on a hot water heater?

Temperature/pressure-relief or TPR valves are safety devices installed on water heating appliances, such as boilers and domestic water supply heaters. TPRs are designed to automatically release water in the event that pressure or temperature in the water tank exceeds safe levels.

Should water come out of pressure relief valve on water heater?

While it’s normal for some water to leak from the pressure relief valve, the unit itself should never leak water. This can happen when the valve doesn’t properly relieve pressure from the unit and, in response, the tank ruptures.

How do I know if my T&P valve is bad?

Quote from Youtube video: This is the same type of air valve that you'll find on tires. To see if the air or water comes out of it. If water is expelled from the valve that a tank needs to be replaced.

How do you test a TPR valve on a water heater?

To test the TPR valve, simply lift it up and down several times. This should lift the attached brass stem and hot water should get flow out of the drainpipe. You should hear a gurgling sound as the valve allows some water to be released into the drain tube.

How often should a TPR valve be replaced?

every three to five years

Repair every three to five years.

How much does it cost to replace a TPR valve?

between $150 and $300 dollars

TPR valves are cheap and the installation is not very expensive. Total cost for parts and professional installation by a licensed plumber is between $150 and $300 dollars. Homeowners can also install TPR valves themselves for about $20.

Is a pressure relief valve necessary?

Without the valve, your water heater may run the risk of an explosion if the temperature or pressure got higher than what the tank was designed to handle. To put it simply, storage water heaters can be hazardous or even lethal if they do not come with a temperature and pressure relief valve.

How long do TPR valves last?

As we mentioned earlier, pressure relief valves that are properly maintained can last for up to 30 years. In most cases, it’s important to look at the “why” behind pressure relief valve failure, rather than just replacing the valve in question.

What causes a pressure relief valve to go off?

If at any point the temperature or pressure reaches an unsafe level, the water heater triggers the relief valve to open and release water out of the tank until the temperature and pressure return to normal.

What causes a hot water heater pressure relief valve to leak?

Excessive Tank Pressure

Chronically high pressure inside of a water heater is one of the most common causes of water heater pressure relief valve leaks.