Why Is My Hot Water heater making Knocking Sound?

Have you had the misfortune of hearing your water heater make a knocking noise that bordered on being annoying? If you want answers, you’ve come to the right place.

Water heaters tend to make a lot of commotion that occasionally signifies a serious problem that needs to be looked at, and oftentimes it is nothing to fuss over.

Paying heed to early warnings signs will save you from long-term damage and will help you get it fixed as soon as possible.

Your plumbing devices are normally low-maintenance and require minimal attention in the long-term; however, a water heater is an exception.

Hot Water heater making Knocking Sound

You need to flush a water heater once a year to protect it and ensure that it proceeds to perform properly.

What causes this knocking sound?

Sediment catches water underneath it at the bottom of the tank, which is where the gas heating burner is situated.

When the gas burner heats up the water, it steams and boils up until it can no holder hold it in and escapes the sediment layer.

When this happens to your water heater, its increased temperature provokes the excess to stiffen and imprison the pockets of water. Under high temperatures, this moisture can turn into steam which then blasts through the layer of sediment.

To explain it insimpler terms: it is very similar to when you put a pot filled with water on a hot stove and put the lid on so, when the water starts to boil, it pushes at the lid due to the pressure building inside.

Should You Worry About Sediment Build-Up?

The quick answer to this is yes.

Just like several other appliances in your home, your water heater requires regular maintenance to ensure that it works the way it should and you get as much hot water you want and when you desire it.

Annual flushing is one of the most significant aspects of maintenance because it discards the sediments and other residues that collect at the bottom of the tank.

Don’t want to go through the hassle of doing it on your own?

Some of the problems sediment build-up might cause are:

Inability to heat up water is the first indication because that means the tank has a lot of sediment build-up that is making it hard for the appliance to do its job.

  • Higher Bills

Your appliance uses energy whether it is operated by gas or electricity and, if something is causing it to not perform well, then it will use double the energy and become costly.

  • Leaking

Water heaters come with a protective lining that shields them from rust and damages; however, difficulties mayarise due to the sediment build-up, causing leakage as the tank overheats and uses extra energy. The tank lining may also break.

Why is Water Heater Flushing Vital?

Flushing your water heater is crucial for a lot of reasons, the most important being to get rid of mud, minerals, dirt, and a few other remnants that could potentially build up at the bottom of your water tank.

When the water reaches your home through the central water inlet, it’s not clean.

It is very common for the water to have concentrated calcium and magnesium in it; while these materials aren’t harmful or bad for you, they can amass, thicken, and even blend in with dirt and some fairly common remains that risk becoming sediment.

If you want a constant supply of hot water and want your water heater to work as good as new, then it is important to flush your water heater from time to time.

Flushing will also extend your water heater’s life and decrease maintenance costs.

How to Flush a Water Heater?

The process of flushing a water heater is fairly simple: all you need is a hose and some drainage.

To flush a water heater, you need to:

  • Shut off the connection to the tank.
  • Connect the hose with the drain valve and ensure the other end of the hose is in a big bucket or is safely positioned into a drainage system.
  • Unlock the drain valve to let the water flow out. Also, keep the temperature and pressure relief valve open.
  • After a few minutes, start gathering a bucket of the draining water to examine it. If the sediments remain, then continue letting water flow out.
  • When you stop seeing the remains in the bottom, close the drain valve and refill it.
  • Restart your connection.

Fair warning: doing this yourself will not always ensure proper functioning of your water heater.

Don’t want to go through the hassle of doing it on your own?

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Water Heater Still Knocking After Flushing?

While the flushing process is rather easy and simple, it doesn’t always guarantee a solution.

There is still a very high probability of hearing the knocking sound; this is one of the reasons why heaters tend to have a short life span because often the flushing is ignored and that allows the sediments to solidify firmly – even regular flushing won’t fix the problem then.

If you don’t give proper attention to this issue and don’t spare some expense for maintenance, you are taking the risk of the water heater leaking and causing some seriousdamage.

We would recommend hiring a plumbing service so you can tackle the problem professionally.

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By not flushing your water heater properly, you’ll also end up having to replace it sooner rather than later.

All of these issues can easily be avoided by contacting plumbers so you can keep yourself and your house safe while also avoiding the hassle of having to constantly fix this issue.

Final Thoughts

Whenever you hear an unusual sound coming from your water heater, the instant solution is to call the plumber.

Do not ignore or prolong this because you are risking your house getting affected by serious water damage.

The gathering and accumulation of sediments at the bottom of your water tank is a serious problem that must be looked at because, if you let it happen and ignore it, it will eventually be too late and will cause you the unexpected burden of replacing your water heater.

Don’t want to go through the hassle of doing it on your own?