Motives Why a Hot Water Tank Will Explode

With regards to having to perform servicing on ones water heater, it is a reasonably minimal maintenance home appliance. Even so, one necessary aspect of it should be checked out routinely. Hot Water Heater Repair Madison WI wishes to pass on this safety information regarding ones water heater today.

Extreme temperature when joined with tank deterioration inside the storage tank can result in an explosion. If the water temperature is less than 212 degrees Fahrenheit, one will be safe from an explosion, though there is a danger of scalding at that temperature. But, if the water temperature is above 212 degrees, water changes into steam, which will then expand to 1,700 times the space it occupies as water. This is when an explosion can occur.

Cautionary Indications of a Water Heater Explosion

The leading sign is if one goes to get hot water from a faucet and only steam comes out. Immediately shut off electric power if one owns an electric water heater. If one owns a gas hot water heater, shut off the gas valve on the water heater. After that, get in touch with us to come assess the situation.

Minimizing Potential Water Heater Dangers

The most crucial upkeep activity having a water heater is to check the pressure relief valve, also referred to as the T&P valve, on a usual schedule. This valve helps regulate the pressure buildup inside of the water storage tank to avoid a unsafe increase in temperature and overpressure.


Be careful, the water discharge from a T&P valve can be really hot. If you do not feel safe testing the valve let us know. Additionally, doing any sort of repairs to the valve should be undertaken by a specialized plumbing repair company.

How to Test the T&P Valve

Remove anything from around the spot around the overflow pipe and floor drain.

Raise the test handle for approximately 5 seconds or until the water runs clear.

Let go of the handle.

If the T&P valve keeps on running with water, lift the handle up and down quickly to get it to reseat itself. One may need to do this a couple of times. IF it has not been tested for a while, it might be difficult to raise it at first. Avoid using too much force, but might need to use just a little.

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

Other things to look for are corrosion on the stem of the valve. If there is any water leaking from the valve stem or out of the drain valve.

Interested in far more ideas? Have a look at our additional articles right here:

Water Heater Maintenance Infographic

Madison WI 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 Madison WI

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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