Why Does My Toilet Whistle?

Why Does My Toilet Whistle?

Whether it is a soft whistling or an ear-piercing screech, strange noises from your toilet can be both annoying and a sign that there is something wrong with your commode's internals. In most cases, whistling noises are related to the opening of a metal ballcock valve in your toilet's tank.

How Does a Toilet Fill Valve Work?

Inside your toilet's tank, there is a fill valve which regulates the amount of water that enters the tank after flushing. The ball, positioned at the end of a metal armature, drops as soon as you flush the toilet, opening the aperture on the other end of the armature. When the water rises, the aperture gradually closes and eventually shuts off water entering the tank.

What Causes Toilets to Whistle?

If the gasket or the parts of your toilet's fill valve are old and worn, they may vibrate. The vibration transfers to the armature and ball, thus causing the high-pitched sound. The vibration stops only when the aperture closes completely.

A high-pitched sound when your toilet refills could mean the following:

  • The fill valve requires a new gasket
  • You need a new fill valve

Replace the Fill Valve to Eliminate Toilet Whistling

Since replacing valves are inexpensive and easy to install, getting a new fill valve is the best option. Most new valves are comprised of all-plastic parts, which prevents them from whistling.

The following are the proper steps to replace the valve:

  1. Shut off the water and empty tank.
  2. Unscrew the old valve from the bottom of the tank.
  3. Adjust the new one to fill to the adequate level and screw it in.

If you are still experiencing problems with your toilet, contact our licensed Bartlett plumber at Smith’s Plumbing Services today.

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