The water supply valve regulates the level of water inside your toilet bowl. This valve is usually found at the back of the toilet, attached to the wall. It is unlikely that the whistling problem comes from here but it is good to check all possible problematic areas.
Once you ascertain that the whistling sound is not coming from the water supply valve, check thefill valve. Check to see if there is any debris lodged here that may be interfering with the water flow and remove them.
Wipe the surface using a piece of clothing and then rinse with clean water. Flush the toilet to see if the problem is fixed. If not, go to the next step- replacing the fill valve.
Before you learn how to replace the fill valve, you should understand how it works. After flushing the toilet, the water level goes down. The fill valve will rise or fall as the water level changes.
Once the toilet bowl is full, the valve closes to prevent more water from flowing into the bowl. If the valve is damaged or defective whistling sounds will come out of your toilet.
To replace the fill valve inside your toilet follow these steps:
1. Locate the water supply valve It should be under the toilet tank. Turn the knob and shut the water off. The repair process will be easier if there is no water flowing into the bowl.
To replace the fill valve inside your toilet follow these steps:
2. Remove water Empty the remaining water inside the tank. Flush the toilet and then use an old cup to remove water still in the bowl. If there is a small amount that you can’t get out, use a towel or sponge to soak it up.
To replace the fill valve inside your toilet follow these steps:
4. Place the new valve Place the new valve and ensure the washers have been placed correctly. Adjust the new fill valve to fill the right water level needed and then attach it correctly to the toilet tank.