Why is my Toilet Loud – Plumber Explains The Real Truth

You may have had to deal with a loud sounding toilet for some time now. Is there a way to reduce the sound or is it something that you will need to deal with far into the future? I researched these sound problems for toilets to find out what can be done.

Why is my toilet loud? Your toilet is loud because the toilet fill valve needs to be cleaned of debris. When it is dirty, the loud noise occurs since the clogged fill value attempts to force water into the toilet bowl after a flush.

According to the plumbing experts at Korky Toilet Repair in Burlington, Wisconsin, debris can clog the fill value causing a small stream of water to enter the toilet bowl under higher pressure than normal. This added pressure will cause a foghorn type of noise with the toilet.

This debris is usually in the form of calcium, potassium, and magnesium. This debris can stick into the fill value causing its tubing to have a narrow path for water. Besides just the noise due to this debris, there are other causes of toilet noise that I will highlight.

  1. Gurgling or a noise that sounds like a mass of bubbles – The cause of this noise is there is a clog that is within the drain section of your toilet. The drains snake upwards and then it turns downwards. If paper material is stuck on the hit ridges on this piping, it will expand because it will absorb water. This will cause a block. The water trying to enter the lower part of the drain will increase in pressure and cause a bubbling noise when it finally descends.
  2. Hissing sound from the toilet – The main cause of the hissing sound is that your toilet is constantly having water enter the toilet bowl. The rubber flap that seals the bottom of the tank allows water to enter the toilet bowl even after it is full enough after a flush. You need to replace it or at least remove the debris that may be causing an inadequate seal.

You may have experienced the above sounds, and a noise has suddenly appeared. I will analyze why the sounds can pop up without notice of a problem occurring.

Why is my toilet suddenly loud?

Your toilet is suddenly loud because a clog has formed that was not there before due to a blockage that occurred during the last flush. Also, there is a chance that debris has just recently been trapped under the rubber seal causing water to leak into the bowl even after it is full enough.

A clog is something that can cause a noise to occur. There may have been mineral deposits that were in your water that were slowly clinging to the pipe in your toilet system. The water will still pass through the S pipe if there is enough space.

Nevertheless, the rough texture of the lining of the toilet drainpipe will allow other materials to stick to the inside of the pipe. For some time, you have been flushing paper materials that are so called flushable, such as baby wipes, only to find out that a clog has occurred.

When a baby wipe is torn by the mineral deposits in the piping, they will leave behind some portions of a baby wipe. These small portions will accumulate causing the dreaded clog that seems to suddenly happen. Try to avoid flushing any material down your toilet that are paper products besides regular toilet paper. Besides paper clogs that cause a sudden toilet noise, you may have a rubber seal that is not fully closing.

If there is debris trapped underneath the rubber flap in the toilet tank, a sudden noise will occur. This situation is instantaneous because of mineral debris that is within well water or even city water that is hard. Mcgill university has stated that calcium, sulphates, and chlorides can cause blockages in plumbing. Some city water, such as in Montreal, is considered hard because of an elevated level of these agents.

If you have noticed that there are small rock-like fragments in your toilet tank after hearing a noise in your toilet, it is best to inspect the rubber flap. You may need to turn off the water, flush the toilet to empty the tank so that you can inspect it.

If the rubber flap is intact, just clean off its bottom surface so that any debris will be removed. Now reintroduce the water flow and the noise should not occur. Also, ensure that you remove any mineral fragments from the inside of the tank so that the problem will not occur again.

If you have tried the above method to reduce the noise in your toilet, you should now try a few tactics to decrease the sound of your toilet if you still find it to be too noisy.

How do I make my toilet flush quieter?

To make your toilet flush quieter you need to remove any debris from the refill value, the rubber flap, and use a plunger to unclog any residue that is built up in the S-trap piping. Also, you can set the level of water that stays in the bowl so that the flushing noise will be shorter.

According to Make McKenna, owner of A. McKeena Plumbing Ltd., you first need to remove any limestone buildup that is on the underside of the rubber plunger or flap that is in the bottom of the tank. Try using a plastic scrub pad or just your fingernail to remove the debris.

Do not use something abrasive since that will ruin the seal that should be formed by the flap that is working properly. By doing so, the seal will be intact once again and the noise that occurs when water escapes continuously into the bowl will cease.

If you have a hissing toilet problem, you need to deal with it right away to make your toilet once again. The hissing sound is created when the refill value is not clean. You need to clean off any limestone buildup on this device to have a more silent toilet.

Besides hissing, you might hear a loud banging noise after you have flushed the toilet. It could last for several minutes, and it will even shake the water pipes in your wall. I have heard this sound in my toilet, and I was worried that it was so loud that it is bothering my neighbors.

Quietest Toilet Suggestions in Online Forums

Quiet Toilet Suggestions Percentage of Results
Toto (click for price)52%
Drake (click for price)26%
data from various DIY forums

Why is my toilet making a noise every few minutes?

Your toilet is making a noise every few minutes because it is losing water which causes it to randomly flush. You will need to check the refill valve and the flapper to track down how water is leaking out of the toilet tank.

According to an international plumbing supply company called Fluidmaster, you need to check to see where the leak is coming from so that your toilet will not randomly make noise. After a proper flush and the sealing of the intake of water, the toilet should no longer make a noise.

You should read why does my toilet whistle if you hear such a sound.

There are two areas that you need to check:

  1. Verify leaks that are internal
  2. Verify for leaks that are happening externally from the toilet.

For internal leaks, check to see that refill tube that is attached to refill value is not too far in the overflow pipe. Try to attach it near the top of the overflow pipe.

Also, the plumbers at Out of This World Plumbing in Ottawa, Canada, state that a faulty seal of the flapper can cause the internal water leakage.

For external leaks, there is water leaking from the refill valve that is attached to the bottom of the toilet tank if you do not notice any water around the edge of the toilet bowl. To eliminate this leak, simply tighten the large white washer that anchors the refill value to the bottom of the tank.

Why does my toilet sound like a jet engine?

Your toilet sounds like a jet engine because your old toilet has a metal ballcock fill valve that has a loose washer. The sound is from air passing through the washer that does not have the correct seal.

Bob Larson, the CEO of Bob Larson Plumbing in Tacoma Washington, states that a jet engine noise is happening due to the older version of the refill valve that has a metal ballcock attached to it. Since toilets that have this assembly are old, the washer that is attached to the end of the ballcock arm can become worn especially if the water is hard.

You can try to replace the ballcock assembly that will stop the loud noise, but the cost will be as high as replacing the whole refill valve assembly with a more modern version. There is a great chance for the refill valve that is new can last an extended period.

Here are the steps that are involved to replace the ballcock-style refill valve:

  1. Turn off the water to the tank by turning the water valve that is usually close to the floor behind the toilet tank. Turn it clockwise.
  2. Flush the tank to remove all the water. If there is any water left, place a bucket underneath the water supply line that is at the bottom of the tank. We will remove the assembly which will leave an opening for the rest of the water to drain out.
  3. Loosen the nut where the water supply attaches to the tank and unhook the water line.
  4. Now remove the nut that holds the ballcock assembly in place (some place where the water line had entered the bottom of the tank.
  5. Pull up on the assembly to remove it from the tank.
  6. Now you are ready to install the new non-ballcock refill valve. For a toto THU435 fill valve, click here for current pricing at Walmart.
  7. Add the washer to the bottom of the assembly. This will create a seal so that water will not drip out of the tank.
  8. Drop the refill valve into the hole in the bottom of the tank.
  9. Add the white plastic nut to the bottom of the tank so that the assembly is locked into place.
  10. Connect the refill tube to the assembly and to the overflow pipe.

How to get air out of toilet pipes?

To get the air of toilet pipes you need to turn off the main water supply, open all the faucets, flush the toilets and then turn the main water supply back on.

The plumbing experts at Express Sewer in Sacramento, California, state that small air pockets can form in your water pipes that will cause a banging noise. These air bubbles must be removed for the noise to cease. Nevertheless, Richard Tretheway, a master plumber for This Old House, feels that you do not to call a plumber to fix this air bubble problem; you can do it yourself. Here are the steps:

  1. Shut off the main water supply. You will need to turn it to the left to close off the water. If it too hard to turn because of calcium build-up, call a plumber instead of damaging it.
  2. Now you need to turn on all the faucets. Turn them just halfway at first and then full on. Make sure that you start the dishwasher, the washer, and flush all the toilets.
  3. The next step is to turn the water back on and then to turn on a faucet. Let the water run for 15 minutes and listen for the dreaded sound. Now flush the re-flush the toilets to see if air is still trapped in the pipes.
  4. If the noise is still there, you may need to install a water hammer arrestor. I recommend the Watts Model of Water Hammer Arrestor. Click here to have it delivered to your home.
  5. After the installation of the water hammer arrestor, if the sound is still there, you need to call a plumber so that she can reduce the water pressure level for you.


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Aron Blake

I am the lead copywriter on Homezesty and the Webmaster. I have a lot of experience in home renovations and the creation of style. I enjoy writing and sharing my tips on how to create the best living environment. My Linkedin Profile, My Twitter Account

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