Regardless of whether the noise you are hearing when flushing the toilet sounds more like a rattling or a vibration, it is not something you should ignore. Although this typically isn’t a plumbing emergency and is probably an issue with the fill valve, it’s important to take a look before anything gets worse, especially since the fill valve isn’t always the cause of the rattling sound. For example, high water pressure may be the cause. Ignoring this problem could lead to disastrous damage, potentially flooding your bathroom.
Diagnosing The Issue
First, to fix the plumbing emergency you are experiencing, it is essential to diagnose the problem. Therefore, you must figure out exactly where the noise is coming from and pay attention to whether you can hear it only when flushing the toilet or when you switch off the faucet as well. Doing all this before calling a plumber is extremely important. You don’t want them to cut into your bathroom walls only to realize the noise is not coming from there.
Here are four possible reasons why your toilet is making vibrating noises while flushing.
1. The Fill Valve
If you hear some sort of vibrating sound when you flush the toilet, it could be an issue with the fill valve. To be more specific, the fill valve has a diaphragm gasket, which may wear out and become way less flexible and stiff. The good thing is you can check this yourself. Just take off the lid of the tank and gently lift the valve arm. If that doesn’t cause the vibration you would normally hear, the fill valve is worn out and must be replaced.
2. Loose Pipe
Sometimes, the loud vibrating noise is not coming from the toilet itself. The noise could even be coming from a loose pipe inside your wall. In that case, getting rid of the noise is a piece of cake. You only need to attach your pipe to the framing using pipe clips. However, if you don’t think you can fix this on your own, we highly recommend calling a professional.
3. Random Vibrations
If the vibrations are totally random and don’t occur only when you flush, the toilet’s flapper may be the cause. The flapper tends to wear out, and thus water starts leaking into the bowl. When the tank refills, the vibrating noise occurs. In order to extend the life of your toilet flapper you should avoid regularly using harsh cleaning chemicals.
4. Water Hammer Effect
The rattling sound and vibrations coming out of your walls could also be the result of the water hammer effect. This means the valve is shutting off too quickly and the water is hitting up against it. Aside from toilets, this problem can also happen with faucets. There are multiple ways you can approach the water hammer effect problem. The first one is hiring a plumber, who will most likely install a water hammer arrestor to the pipes. The second approach is much easier. You can buy fill valves that close slower than the ones you have. This kind of valve is called a “slow-shutting fill valve.”
When To Call A Plumber?
Hiring a licensed plumber is not only expensive, but it might not even be necessary. Still, consider hiring a licensed plumber if:
- The issue is with the sewer line
- The water hammer effect doesn’t go away after installing an arrestor
- Some water damage around the fixtures or pipes
- You don’t have the necessary equipment to repair the pipes yourself
There are a bunch of things that could be causing the rattling, loud vibrating noise you hear when you flush the toilet. Although some of them are pretty simple to fix, others may give you a headache if you try to fix them on your own. Therefore, regardless of what’s causing the noise, if you don’t feel comfortable fixing it yourself you should hire a plumber.