Ever notice that sometimes when you flush your toilet you start to hear funny noises afterward?  It is even more pronounced when you flush after midnight and sometimes you observe that the toilet keeps running even after the tank appears filled. This can be bothering as a noisy toilet isn’t always normal, so try not to ignore the noises as it might be a sign that your toilet plumbing needs to be checked.

If your toilet keeps making noise when it’s being flushed or when it’s not in use, there are a variety of possible causes. Realizing when a toilet noise warrants a call to the plumber can be frustrating and stressful. Here, we will break down some common causes of a noisy toilet, this will help you identify any plumbing issues you may be having and repairs to be done.

There are several causes of a noisy toilet, however the most common include:

  1. The shut-off isolation valve could be vibrating.

If there is a constant vibrating sound around the wall whenever the toilet is flushed, there might be a problem with the fill valve.  Especially if the gasket inside the fill valve is wearing off, or has lost its elasticity. You can know if the issue is a faulty fill valve by removing the toilet tank lid and lifting the float arm gently. If your toilet keeps making the whining sound or is making the wall around it vibrate every few minutes, it could be an issue with your toilet valve leaking. It could also mean your fill valve is not functioning properly as it should. Checking the water connection behind the toilet for leakage can tell you require bathroom plumbing. Looking in the tank of the toilet to see if your tank is filling up all the way will also help you determine if your fill valve needs to be replaced.

  1. The fill valve is having a having difficulty shutting off

There is a possibility of your toilet being noisy because the toilet water is constantly running. This tends to be a problem with the fill valve not shutting off when it should. Once again, resetting the float arm to a lower level inside the toilet can be the solution. First, you have to remove the toilet tank lid and locate the float. There are a few types of float, which include, a cylinder float that is attached to the body of the fill valve and a floating ball type that is attached to the end of the rod.

For the cylinder float, notice a clip that is adjustable which can be squeezed to lower the float down until it stops the water from running. If you have a float ball, on top of the fill valve turn the screw counterclockwise until the water stops running fully. However, if you have both, once you have made the adjustment, try to flush the toilet once again. If you have a fill valve that is worn out or damaged, then there is no adjustment that can be made to resolve the problem successfully and this would mean that you would most likely need to have the faulty part replaced.

  1. Calcium buildup inside the pipes

Notice the toilet making a whining sound even when the toilet is filling up? This is the effect of hard water which leads to calcium build-up in the pipe, scale is often formed. It is mostly found in the bathroom and it causes toilet issues like cloudy water, slow flushing, and eventually noisy pipe when the toilet is flushed. Calcium buildup creates a white or rust-colored rim around the toilet water line and leaves hard water stains in toilet bowls. This results in clogs and leaks in the future.

This can be prevented by cleaning the toilet tank regularly, at least once a week. This will mostly prevent hard water stains. You need to also deep clean the toilet tank every six months because the toilet tank is harbors calcium, rust, bacteria, mold, and mildew. These particles do not just harm pipes, they also lead to foul odors. Deep-cleaning your tank reduces buildup and increases pipe longevity. Also, it’s important to make some investment in the use of water softeners. If the calcium build-up is already beyond what you can fix, call your plumber.


Sometimes, resolving this noise can be as easy as replacing the valve to avoid a more complex situation like water leakage. These noises with the toilet do not necessarily have to put a strain on your pocket since you might be able to make some minor changes on your own but while trying to get this fixed on your own it is important to know when to call a plumber.

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