Water Heater Boom Sound (Explained & Fixed)

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Written By John Roe Stephen

Here is a breakdown of how sediment contributes to the sound. The gas-heating stove is located at the tank’s bottom, where the sediment collects water. Suddenly, the water bursts out of the sediment layer as the gas burner warms it up. This has a percolating coffee-maker sound to it.

Electric Water Heater Boom Sound

The sound of a water heater booming is one of the most prevalent. Excess sediment build up is usually the cause of these sounds. You may hear little explosions coming from your water heater if it has accumulated enough silt in the tank.

Reasons For Electric Water Boom Sound

  • Mineralization and Sedimentation

Consider a tank water heater to get the correct temperature for your home’s drinking water. Minerals and silt will build up in the water heater’s tank over time.

Similarly, even after you have emptied the pot of all the water, mineral deposits will still be visible on the inside of the vessel when you boil water. Imagine going through this every day for years.

A build up of sediment and mineral formations on your water heater’s interior components is almost certain if your heater isn’t cleansed and emptied once a year for maintenance.

There may be popping sounds if there are excessive salt and mineral deposits in place. In the bottom, if your heater, sediment may turn into a rock-like substance, making it tough to drain or flush.

Sediment in the bottom of your water heater may cause a loud booming sound if it reaches critical mass. As the water temperatures rise, the booming sound is generally caused by water escaping from beneath and around the sediment.

This is a warning sign that the water heater is nearing the end of its useful life and should be replaced before it bursts.

  • Too Much Pressure 

A further sign that the pressure within your water heater is too high is loud banging sounds. In the absence of an expansion tank, this is particularly true. Eventually, the water heater’s pressure builds up to a crisis point and a loud boom sounds when it does. Depending on the context, this might be a harmless noise or a life-threatening one. Take it seriously, and don’t brush it off.

  • Replacements Are Needed For Several Of The Components

The sound of crackling, sizzling, hissing, or popping from your electric water heater doesn’t necessarily signal it has to be replaced.

The cracking and sizzling sounds in your water heater are caused by the build up of sediment and minerals on the heater’s internal components, such as the elements.

If the threaded area of the water heater is still in excellent condition and hasn’t exceeded its life expectancy, changing your elements might be a feasible alternative for repairing the problem.


  • By draining out the bottom of a tank, you may fix a rumble or banging sound in your hot water tank. Turn on the gas control to the pilot position if your tank is powered by gasoline. If it is electric-powered, cut off the breaker that supplies the tank.
  • Cut the tank’s shut-off valve to push off the tank’s supply of cold water. Either the gas or electric tank has a valve located on the narrow pipe that emerges from the top of the water. In the absence of a handle, a wrench should be used instead.
  • The tank’s drain valve may be connected via a hose—the drain valve on the tank’s little spigot. To avoid an air gap in the heater, turn on the hot water at a nearby sink.

Gas Water Heater Boom Sound

If your water heater makes booming noises, dirt or silt has accumulated in the tank’s bottom. Because of this, you may hear a booming sound when boiling water is stuck in sediment. Draining the tank may assist with this problem in certain instances.

Reasons For Gas Water Boom Sound

  • Infrared Heat Exchanger Nipples

Heat trap nipples are often blamed for a water heater’s booming sound. To retain hot water in the tank, heat-trapping nipples are used. However, they may make a lot of noise while the water heater is running or when the pressure fluctuates dramatically.

Replacing your heat trap nipples is good if you hear a tapping noise echoing throughout your house.

  • Condensation and Leaks

If water is dripping just on the burner component of a gas heater, you will hear a sizzling or booming sound. Condensation on the flame assembly or a leak in the tanks is two possible water sources.

You may need to replace your water heater if the dripping comes from a leaky water heater tank, but if it is condensation, it will cease when the water heater warms up.


  • The valve must be shut off. Because residue and debris are clogging the drain valve, it won’t shut entirely. Attach the hose cap securely to the valve using the hose cap. Use Teflon piping tape instead of the cap’s internal gasket if it doesn’t have one. When you’re done, screw on your cap, and you’re good to go!
  • Turn on the tank’s cold water to refill the water heater. Turn the faucet back on at the sink when you’re done using the hot water. (At this stage, the water will be chilly.) Please turn off the sink’s faucet when you notice that the hot water has completely dripped. Reset the gas switch to “On.”
  • Using a water pressure gauge, check the level in your hot water tank if you hear rushing liquid or sloshing sounds from the tank. Before and after the tank has been operating for a few minutes, check the water pressure. Never allow the pressure to get over 70 pounds per square inch. 
  • Lower the tank heater’s thermostat to its lowest setting. Set up the pressure gauge on the tank’s drain valve, located at the bottom. Ensure that the gauge may read the pressure by releasing the drain valve.

RV Water Heater Boom Sound

As you use the water heater more and more, sediment will accumulate just at the bottom of the tank. This is a fact and cannot be avoided. As the air bubbles rise to the tank’s surface, you may hear a booming sound. This may be due to the air trapped under the sediment.

Reasons For RV Water Heater Boom Sound

  • Water Hammering

Water heater tank echoing is the most common cause of a loud boom at the water heater, but there are other causes. In an enclosed system, a water hammer occurs when unexpected pressure changes cause water to flip back and forth.

Sound travels long distances across the water, making water hammers challenging to identify. If you hear a loud hammering noise coming from your faucet, give us a call, and we’ll send someone out to investigate and remedy the problem.

  • Valve Partially Or Completely Closed

The manufacturer usually advises on adequately maintaining a water heater. If your water heater is making a loud sizzling or booming noise, you should assume that there is a limit in water flow.

Check the valve’s temperature and pressure as soon as possible. If water leaks from the valve, you may be confident your heater is malfunctioning.


  • Keep an eye on the gauge. You should open the heater’s pressure and temperature relief valve (T & P) if the pressure is 80 or higher. It will be on the tank’s rim, and it will be connected to a narrow pipe that runs down the tank’s length.
  • To test if it will start dropping, try opening and closing the valves a few times. If the present T&P valve continues to leak, get a new one. The water in the tank may be released if the pressure relief valve is in good functioning order.

If you’re not sure you can do it properly and safely, have a professional install the replacement T&P valve and expansion tank.


To maintain a pleasant temperature in your house, you must have a working water heater. You’ll want to check sure your water heater is up to keeping you and your family warm and secure as you wash your hands or do the dishes. 

If you hear a strange buzzing noise coming from your water heater, you should get it checked out.

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