Why Do Water Heaters Make Noise? | Quick Answer & Solutions

Water heaters can make various noises; in some cases, these noises indicate an issue, and sometimes there is no need to worry at all. Although identifying the noises being made may give you early warning of parts that need maintenance or substitution.

Here are the basic sounds you hear and the most basic water heater problems associated with them.

Noises Like Crackling, Popping, And Rumbling

Residue gathers around the component containers of a water heater. When the component is off, the solidified residue traps water underneath them, and the water heats until it makes a popping sound as it is constrained through the deposits. Such sounds are ubiquitous with older units, and the noise increases as the deposits layer thickens. You can get it cleaned or replaced by the element.

The rumbling sound is one more indication that the heater needs maintenance, produced by sediments being stirred by the water flow inside the tank. You can use a deliming mixture to clean the tank and drain the water heater.

If maintenance can’t cure the issue, the noises may be associated with the main steel tank. Metal lines can make comparative clamors in circumstances where the water is heated above 125 degrees.

water heater noisy

1. Murmuring

In a water heater, the element is positioned vertically compared to the tank. Water streaming around the part can cause vibrations in this circumstance, making a murmuring noise.


Tighten The element a little to correct the problem.

2. Knocking or Hammering

A knocking sound in your dividers is identified with pipes warming inside. When the water supply is unexpectedly stopped in the tank, it can make the lines move, striking against studs or the inside of dividers.

water heater making loud noise

This can be brought about by a dishwasher or a latrine bowl or a water siphon without a holding tank.


The noise is not harmful to your water heater but could lead to gradual wall damage if it is not rectified. The solution to this could be installing a water hammer arrestor between the offending device and the tank water heater.

water heater making noise like water running

3. Screeching, Screaming

Shouting sounds are made by water being constrained through a little opening. This is normally brought about by a valve that isn’t wholly opened, either at the water heater or a specific outlet, for example, a sink.


Get checked the valves in your water lines.

4. Ticking or Tapping

Various water heaters have heat traps or check valves introduced in the lines on the heater’s head. These traps are intended to keep water from streaming off course in the bars and make ticking or light tapping sounds.

water heater popping


This is typical. However, you can exchange the heat trap with an ordinary dielectric nipple if it bothers you.

hot water heater making noise

5. Tankless Water Heater Noise

Tankless water heaters have their specific noises. On the off chance that you hear a clicking commotion, this is commonly simply the stream switch turning on and off to begin and stop water progression and is quite familiar.

Just in case it’s making a great deal of clamor when turned on, it might be because calcium stores are, as a rule, deserted because of hard water in your general vicinity.


Just in case it’s making a great deal of clamor when turned on, it might be because calcium stores are, as a rule, deserted because of hard water in your general vicinity.

Water Heater Maintenance

The solution for most sounds related to your water heater is found in general consideration and maintenance. As minerals in your water lead to sediments in your water heater, installing a water softener in your main water line will lessen buildup and related noises.

Flushing the tank with a deliming arrangement annually will prevent hefty from developing in the tank and serve to keep the components cleaner.

Water Heater Seems As Though It's Running Water

You have purchased a brand new electric water heater; occasionally, it seems as though water is running inside. When the valve at the top of the tank is shut off, the sound stops. There are some simple ways to check:

1. You should review the water meter. Turn off all the taps for about 2-3 hours, and prevent water meter reading before and after. If the home is on water well, check pressure measures prior and then afterward, too.

2. Hotline feels more smoking than cold line. Hot, cold lines are appended to the head of the heater.

When hot water is running, the hotline feels hot to contact because the boiling water runs through the line. You can use your hand to measure the temperature of the hot sideline when no taps are on.

water heater loud pop

3. Sound In The Pipe

Turn off all taps and try to hear by putting the ear against the hot pipe. If you hear the sound of running water, there is probably a leak somewhere. A continual leak will drain the burning out of the tank, which results in a shortage of hot water.

Broken Pipe

If your water pipes are under a section, they can break and leak, and you can hear the sound, although you can’t see

1- if your water pipes are under a trailer or in a crawlspace, the leak may not be noticeable.

2- PVC and CPVC plastic pipes can be broken relatively easily. Galvanized pipes can rust or deteriorate over some time. Copper and PEX are Suggested, can withstand expansion-contraction from the cold-hot season, and bends due to house or structure movement over time.

There is a TP valve located on the side of the heater, with a flooded tube. If this cylinder goes to the lower part of the heater, you can outwardly check whether it’s spilling. Yet if the flood tube experiences the divider someplace, the TP valve may be spilling.

Put a hand online to prevent whether it feels warm. Eventually, lift the switch on the TP valve and afterward reset to check if that tackles the issue.

Leaking the TP valve will empty water from the tank. If the TP is broken or the water inside the tank is overheating, both are far -fetched with a new heater, yet regular with more seasoned heaters. TP valve code troubleshoot and fix water heater valves.

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