How To Drain A Clogged Water Heater

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When you have hot water running through your pipes and tanks, the most significant problem people face is limescale. This issue is essentially the sediment left behind when hot water causes the minerals to be deposited at the bottom of the tank and in the pipes. The minerals separate due to excessive heat, How To Drain A Clogged Water Heater.

Why should you unclog your water heater?

A water heater should be drained and unclogged because the limescale or mineral deposits will fill up the drain valve and won’t let the water pass through it. This matter will make the water heater severely inefficient. It is incredibly essential to perform maintenance on the water heater tank otherwise It could become damaged.
First, determine whether your drain valve is clogged

  • First and foremost you must turn off the water heater this is done by
  1. Turning off the electricity from the main switch, I.e., the breaker
  2. Turning the main gas valve off
  • This task gets determined by the type of water heater you have.
  • The next part is natural to connect a water hose to the valve in the water heater and turn the valve on
  • Now you should go to the sink and open the hot water to allow the negative pressure that has built up within the water heater to escape.
  • If the water starts pouring out and it is clear that means your water heater is not clogged.
  • If however, no water seems to come out, then your water heater is clogged.

Here are some safety precautions you should take:

  • You should always remember that since you are dealing with a “hot” water heater, you should be very careful not to burn yourself. Always wear protective clothing. Cover your hands and eyes, so you do not burn them.
  • Always try and cool the tank. This task can be done by:
  • Turning off the fuel source and letting the water drain (only possible if the drain valve is partially clogged) once the water has drained enough cold water will pour in and dilute the hot water making it easy to handle. Make sure the water valve gets turned on though otherwise, cold water won’t come.
  • A more straightforward solution is to disconnect the source of the heat, so that means shutting off the main gas valve or disconnecting the electricity for 24 hours.
  • Like before, turn off the heat source. Go to your sink and turn on the hot water faucet. This way, all the hot water will drain out the taps, and the cold water will lower the temperature of the water. Turning off the primary heat source will prevent the water from regaining its hot temperature.
  • The first method of draining the valve is as simple as waiting. If your water heater is partially clogged, you could expect and see if the pressure within the pipes does not just push the sediment away through the drain line. You may leave the drain valve open with a hose attached and close the hot water tap. Then wait for an hour and check again to find out if the drain valve is clogged or not.

The second method is called the wire coat method.

  • Yes, you guessed it. For this, you will need a wire coat hanger or in general any stiff wire.
  • First and foremost close the drain valve and remove the hose attached to it.
  • Place a bucket and several towels under the valve so if and when water leaks out, it does not get the floors wet.
  • Next, open the valve and insert the wire coat into the valve, so it goes into the tank.
  • Now move the coated wire around so you can loosen the sediment within.
  • Once the sediment is loose, the water will start pouring out of the valve.
  • Now all you have to do is turn the water valve off and attach the hose.
  • The valve may, at times, become clogged again. So be patient and restart the process

The third method is called the hose stomp

This process is straightforward. Go towards your water heater. Look at the hose pipe connected to it and stand on it firmly. If there is sediment in the tank, what will happen is that an air bubble will form and travel back into the drain valve, causing the deposit to loosen and fall away unclogging the valve? Repeat the process as many times as required.

This method is called the backflush

  • First, you need a washing machine hose that has two female connections at the end since male ones won’t work.
  • close the drain valve and attach one end of the hose pipe to the valve and the other to any hot water faucet which is closest.
  • Now you must turn on the water faucet
  • go and turn on the drain valve.
  • Allow the water to flow back into the tank of the water heater for 15-20 seconds
  • The water pressure coming from the hose will disperse the sediment that had built up
  • Now turn the water faucet off and close back the drain valve. Remove the hose connected to the faucet and then open the drain valve and let the water drain from the tank.
  • If it still won’t drain your drain valve could be defective and will need replacement.


The water heater requires maintenance so to keep the efficiency of the hot water within the house the same. If the water heater has get clogged generally it causes by minerals that have deposited within the drain clog. Users need to remove that as soon as they can. This task can get done by the various methods mentioned above. The techniques vary depending on the severity of the mineral deposits with the drain valve of the water heater. Remember to take safety precautions as you could be in danger of harming yourself, so wear gloves.