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Why Your Hot Water Tank Makes Strange Noises—and What to Do About It

January

14, 2025

Why Your Hot Water Tank Makes Strange Noises—and What to Do About It

Has your hot water tank started making popping, banging, or rumbling noises? This can be worrying. But, you are not alone. Many people hear these sounds. But do not stress, you are not the only one. Many homeowners hear these noises. They are usually a signal that something needs attention. The good news is, it is something that can often be fixed quickly. If you are in Langley, our hot water tank repairs in Langley are just a phone call away!

 

Common Noises from a Hot Water Tank

 

Popping or Crackling Sounds

If you hear popping or crackling sounds, it is usually from sediment buildup at the bottom of the tank. Over time, minerals from hard water build up. When the water heats up, steam gets trapped below the sediment. That steam bubbles up and causes popping sounds.

 

Banging or Knocking Sounds

If you hear banging or knocking sounds, it could be a bigger problem. This often happens because of hardened sediment or water pressure issues. As steam tries to escape, it can make the tank rumble or bang. It can even sound like a mini thunderstorm in your utility room.

 

Hissing Sounds

Hissing sounds are a little more concerning. This usually means the water is overheating or there is a problem with the valve. If you hear this sound, it is important to act quickly. It could lead to leaks or a tank failure.

 

Why Do These Noises Happen?

The major reason for these noises is the buildup of minerals at the bottom of the tank. These minerals create a layer which makes it harder for the heating element to heat the water properly. As a result, the water overheats, causing those strange sounds.

Sometimes, other things can cause the noise too. A faulty heating element, high water pressure, or loose parts can also be the problem.

Here is a breakdown:

  • Sediment Buildup: The most common cause of the noises.
  • Faulty Heating Element: Can cause uneven heating and strange sounds.
  • Water Pressure: High pressure can make your pipes and tank vibrate, causing noise.
  • Loose Parts: Some parts inside the tank might be vibrating.

 

What Can You Do About It?

 

Flush the Tank

If sediment buildup is the issue, flushing the tank can help. Draining the tank will get rid of the sediment and let the tank work properly again. If you are unsure about how to do this, do not hesitate to call a professional.

 

Adjust the Temperature

Sometimes, the temperature might be too high. If it is, the water may overheat which leads to popping and rumbling sounds. In such case, you should lower the temperature to about 120°F (49°C). This will help your tank run more efficiently and quietly.

 

Check the Heating Element

If flushing does not help, your heating element might need to be checked. A professional plumber can inspect it and replace it if needed.

 

Check Water Pressure

High water pressure can cause noise. Check your pressure regulator. The recommended range is 50-60 psi. If it is too high, adjust it to the correct level.

 

Call a Professional for Hot Water Tank Repairs in Langley

However, if the noise is not eliminated even after taking these measures one should probably call the professionals. Our team at Langley Home Plumbing can diagnose and repair any issues with your hot water tank.

Do not wait until the problem gets worse. Call Langley Home Plumbing at 604-868-6843 today. We will search out the root cause and solve it quickly.

Let us help you get your hot water tank working properly again!