What Causes a Hot Water Tank to Explode

When it comes to having to undertake servicing on ones water heater, it is a comparatively low maintenance home appliance. Nevertheless, one critical aspect of it must be inspected regularly. Hot Water Heater Repair Lubbock TX would like to pass on this safety material concerning ones water heater today.

Extreme temperature when joined with tank deterioration within the storage tank could potentially cause an explosion. If the water temperature is below 212 degrees Fahrenheit, one is going to be protected from an explosion, though there is a threat of scalding at that temperature. However, if the water temperature is greater than 212 degrees, water becomes into steam, which will then expand to 1,700 times the space it takes up as water. This is when an explosion can occur.

Warning Signals of a Water Heater Explosion

The leading sign is if one goes to get hot water from a faucet and only steam comes out. Without delay shut off electric power if one possesses an electric water heater. If one owns a gas hot water heater, turn off the gas valve on the water heater. After that, get in touch with us to come check out the scenario.

Minimizing Potential Water Heater Dangers

The most essential routine maintenance activity having a water heater is to check the pressure relief valve, also called the T&P valve, on a usual basis. This valve helps manage the pressure buildup inside the water storage tank to avert a hazardous increase in temperature and overpressure.


Take note, the water discharge out of a T&P valve might be really hot. If you do not feel safe testing the valve contact us. Additionally, carrying out any type of fixes to the valve really should be executed by a specialized plumbing repair business.

How to Test the T&P Valve

Clear the space close to the overflow pipe and floor drain.

Lift up the test handle for approximately 5 seconds or until the water runs clean.

Let go of the handle.

If the T&P valve continues to run with water, raise the handle up and down quickly to get it to reseat itself. One may have to do this a handful of times. IF it has not been tested for a while, it might be difficult to raise it at first. Don’t use an excessive amount of force, however could need to use just a little.

If the T&P valve continues to have water coming out, it needs to be replaced.

Additional items to watch out for are rust on the stem of the valve. If there is any water leaking from the valve stem or from the drain valve.

Interested in more strategies? Check out our other articles here:

Water Heater Maintenance Infographic

Lubbock TX Water Heater Maintenance

Related T&P Valve Testing Videos

Mythbusters did a test of the potential dangers of hot water heater explosions here:

Water Heater T&P Valve Repair Lubbock TX

What the Experts Say

  • The discharge from a T&P valve can be very hot. It is very important that all T&P valves be installed properly with a discharge line piped downward to an adequate drain to avoid property damage and to minimize possible human contact.
    Read more…

Watts Water Technologies

If the temperature in your heater remains high after you turn down the thermostat, the thermostat may be faulty. Consult a professional for repair. Read more…

Home Guides

Pressure relief valves sometime develop a drip when opened for the first time in years. Try opening and closing it a few times to see if it will seat itself. If you have a large leak or the drip doesn’t stop on its own in a day or two, the valve will need to be replaced.  Read more…

Today's Homeowner

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