It is essential to drain a hot water tank at least once every two months. Draining a hot water tank offers several benefits to the water tank, energy use, and your wallet.

A hot water tank is one of the most user-friendly home appliances. The water tank is crucial to the comfort of the entire household, and it affords everyone the opportunity to have their desired level of water temperature.

Before delving into how to drain a hot water tank, it is essential to consider the benefits the practice offers you.

Benefits of Draining a Hot Water Tank

Most hot water tank manufacturers recommend draining the tank to allow the removal of sediments, silt, and mineral scale buildup. However, many homeowners do not carry out this maintenance process, and eventually, have problems with their appliance. Regardless, draining a hot water tank offers the following benefits:

Read: Why do I have Rust Coloured Water?

Noise Reduction

Over time, when mineral or scale has built up in a hot water tank, there will be banging, crackling, or popping sounds. Meanwhile, the noise may reduce without doing anything to the tank; that is because the layer of the scale has solidified and it is difficult for water to percolate through it easily. However, when you drain and descale the tank, the hot water tank will no longer make a noise when working.

Improved Efficiency

As more foreign materials settle on the bottom of the hot water tank, it becomes more difficult for heat to get transferred easily because of the sediments that have settled on the electrodes of the heater. Draining the water tank will cause the sediments to be removed, and the heating speed will be improved.  

Reduction in Energy Bill

The appliance uses more energy to heat water when scales have built up on its electrodes. Removal of the dirt and scales will enhance the efficiency of the hot water tank with an effect of reduction in the energy consumed for the process. Hence, reduced energy bill.


By draining your hot water tank regularly, you are merely removing scale building that causes the appliance to experience stress. As a result, the metal in the bottom of the tank can get hotter than usual and start to leak or fail. But regular draining and flushing will increase the durability of the appliance.

From the preceding, draining a hot water tank is a very beneficial practice. Now how do you drain a hot water tank?

Read: On Demand Water Heater Maintenance, and Signs of a Failing Hot Water Tank.

How to Drain a Hot Water Tank

The maintenance and repairs of any hot water tank start from draining. The process of draining a hot water tank is not as difficult as it seems; it is a task you can do yourself if you are a lover DIY tasks. Below are the processes involved in draining a hot water tank:

Step 1: Turn the Power Off

The first step you must take is to turn off the breaker that controls the electric unit to the hot water tank to ensure that the heat source is off. If the water tank is controlled by gas, turn off the gas line to make the hot water tank cool off.

Step 2: Turn off Cold Water Supply

There is a cold water valve at the top of the tank. You need to turn off the cold water supply into the unit to prevent water from flowing into the tank during the draining process. Remember to open a hot water tap to reduce the pressure in the system.

Step 3: Connect a Hose to the Drain Faucet

The hot water tank comes with a spigot like the standard faucet to allow draining. The faucet has threads for a garden hose to be attached. Ensure that your hose has a good gasket to prevent water leakage. Attach your hose to the faucet; make sure it is properly screwed.

Step 4: Open a Tap Closest to the Tank

To get the draining process on the way, find the nearest tap to the tank and open it for a quicker process. Air will flow backwards through the tap to enable the hot water tank to drain faster.

Step 5: Open the Faucet on the Bottom of the Tank

Now that you have attached a garden hose to the faucet open the faucet at the bottom of the tank to let water drain through it. You would hear the rush of water as air flows into the tank through the open tap. The amount of time it will take the tank to drain completely depends on the size of the garden hose attached to the lower faucet or spigot and the capacity of the hot water tank.

Step 6: Open the Cold Water Supply Valve

When the tank has drained completely, turn on the cold water supply valve. This process will allow the water pressure to flush out any remaining sediments in the tank. Let the water run for about 10 minutes before shutting the supply off.

Step 7: Close the Drain Faucet

Turn off the faucet and remove the hose. You can now refill the hot water tank and enjoy the use of your appliance.

If that does not fix the problem, Contact our plumbers for Hot Water Tank Replacement Services.


  1. The water from the tank will be hot. As a result, do not place the garden hose close to plants, anything that can be sensitive to hot water or where it could harm anyone.     
  2.  Remember to tighten the faucet in the lower part of the hot water tank to prevent water from dripping.
  3. If you cannot carry out these steps yourself, ask a professional plumber to help to drain your hot water tank. However, it is not difficult to drain the tank personally. 

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