Why Does The Toilet Whistle When Flushing?

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Last Updated on August 8, 2022 by acechapman

Many people ask the question “Why does my toilet whistle?” Feeling concerned? There is no need to be anxious. The soft sound of water flowing through a pipe is normal in most sanitary systems. However, if the sound is loud like a shrill whistle or violent drip, start doing something about it. The valve fill problem can be caused by a yelping sound. I’ll share my experience with you about why my toilet whistles every time I flush and the best way to fix it.

Why Does the Toilet Whistle?

A faulty fill valve can cause whistling most of the time. The fill valve may become damaged if it is used for too long. The toilet may make a hissing sound and whistling noise as a result. The vibrations of a defective valve can make your bathroom hum incessant. If you place a metal ballcock in your bathroom, it may vibrate during the filling of the toilet tank. The metal ballcock vibrates primarily because the fill valve is open.

This problem could also be caused by an old gasket. These crucial factors will ensure that your toilet makes high-pitched noises.

  • The gasket might have become worn out and is leaking into the valve.
  • You need a replacement for your fill valve.
  • Toilet valve leakage.
  • Calcium builds up around the inside of the pipes.

Tools You Need

  • Toilet Fill Valve
  • Toilet Gasket
  • Wrench
  • Screwdriver
  • Phosphoric acid
  • White Vinegar
  • Barium Nitrate

Fixing a whistling toilet

Before you can set, it is important to determine the cause of the problem. Information and inquiries suggest that the problem is most likely due to toilet fill valves. Let’s discuss the best way to fix fill valve problems.

Checking the water supply valve

The toilet will sound if the water flow is disrupted. You must check the water pipe. You will find the knob on the backside of your toilet, near the floor. The valve can be quickly turned off by the child. You will hear the toilet whistling as a result. The knob should be turned counterclockwise. If the problem persists, open the lid and inspect the tank.

Inspecting the fill valve

Once you’re certain that the whistling is not coming from the water supply valve then you can check the fill valve. The fill plug is usually used for the old metal ballcock valve. You will find the fill valve on the left side. Try flushing the toilet one time to find out where the annoying sounds are coming from. If the sound comes from the fill valve, you should check for any barrage. Calcium and mineral buildups often around the fill valve. These elements can block water flow. You can take the necessary steps to get rid of calcium and minerals.

Replacing the fill valve

Check the fill valve and flush the toilet once more. If you notice that your toilet is still whistling, it’s probably time to replace your fill valve. You can replace the gasket of the old ballcock valve and get rid of the annoying clicking sounds. Replace the old fill valve with cheap plastic materials. However, the plastic ball clock is less likely to make a toilet whistle in the future. The plastic lid makes no additional vibration sounds. The new valve is also more efficient and will help you save water and money on your water bills.

Have you made the decision to replace your fill valve? It is easier than you think. Here, I will share the entire process of replacing a valve.

How To Replace the Fill Valve?

  1. Turn off the water supply valve to the toilet and flush it once.
  2. Use a sponge or cotton towel to clean the water tank.
  3. Remove the fill tube.
  4. Remove the screws. 
  5. Replace the fill valve with a new one.
  6. Secure the lock button underneath the tank.
  7. Turn on the water flow valve by using a wrench.
  8. Follow the instructions that come with proper use guidelines.
  9. A clip can be used to adjust a few floating floats.
  10. Wait for the tank to fill properly before flushing the toilet again. When you don’t hear any more whistles. Congratulations! You have succeeded.

If you are still hearing the whistling sound in your toilet, I suggest that you contact a reputable plumbing company to help you out.

Getting rid of the calcium buildup around the pipe

First, find out if your toilet sounds are caused by a calcium deposit. You can check the pipe’s outside to see if any white elements are present. These elements could also be found inside the pipe. Calcium builds up in the tube’s inner parts and can block water flow or cause pipe blockage. It is also responsible for the loud and random noises that toilets make.

You can’t assume that there is calcium in the pipe if you don’t see the calcium white outside. Calcium can build up inside the tube. However, to make sure you are safe, shut off the water supply to the toilet and take out the screws from one end of the box.

Steam. The most powerful method to get rid of calcium deposits is steam. It can soften calcium deposits as well as loosen solid materials by using hot steam. The steam also conducts through the pipe and breaks down calcium deposits.

High-powered water flow. You can also break down the deposits using a high-powered water flow. Be careful though, overpressure can happen during a pipe break.

Cleaning process. There are many effective cleaners on the market, such as barium nitrate,  phosphoric acid, and glycine. These powerful chemicals can be used to break down the deposits. White vinegar may be used as well.

What happens if whistling sounds are ignored?

You might be able to live with this issue and can tolerate it. However, it is strongly recommended that you remove any noises. You might experience difficulties using the toilet if you ignore the whistling sound. You will be mentally and financially affected by the constant toilet whistle. Here are the most serious problems that can be caused by prolonged whistling.

  • This annoying sound you have to endure every day.
  • Gaskets will slowly become obsolete in fill valves.
  • Flushing will require you to use more water than usual.
  • The water bill will rise accordingly.
  • The fill valve can shift and fall.
  • The fill valve may operate continuously or instantly.

You should never ignore this problem. Although it may seem easier to replace or install a new valve, there are sometimes problems that may occur. Remember that an incorrect installation can cost you thousands of dollars. Before installing a fill valve or a new gasket, think thoroughly. You can call a professional plumber to assist you in this situation. A specialist team may be able to help you install or replace.

What if the toilet still makes the whistling sound?

You should consider advanced testing to see if your toilet makes any noises. This can usually be caused by a defective flapper. Take off the lid from the toilet and inspect the flapper. To fix the problem, replace the flapper. Install a flapper to fix the problem and flush the toilet again to make sure it works.

How can you tell if your fill valve is damaged?

There are three ways to tell if your toilet fill valve is failing and if it needs a new one.

  • If your toilet runs continuously, it means that the fill valve has been damaged.
  • Toilet won’t flush or when the flush is too weak.
  • If the toilet tank does not fill properly or it will take a while to fill.

How can you adjust the float of a toilet?

You must set the ball rod afloat on the toilet. To connect them, you’ll need a screw. Rotating the screw clockwise will reduce the water level in the tank. To raise the water level, you must also rotate the screw counterclockwise.

Wrapping Up

Hopefully, now you know the cause and how to stop unnecessary whistles in your toilet. There is no need to be concerned about toilet whistles in the future. You can solve all your toilet whistling problems if you follow these guides.

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