Why Is My Toilet Tank Constantly Filling With Water? Common Causes and Solutions

In our daily lives, toilets play a crucial role、However, when the water inlet valve in the toilet malfunctions, it can cause the toilet tank to continuously fill with water、So, what are the reasons for the toilet tank's water inlet valve to keep filling the tank nonstop?

1、Inlet Valve Not Closing

One common reason for the toilet tank to continuously fill is that the water inlet valve does not close、After using the toilet, the inlet valve should automatically close and stop water from entering the tank、However, for various reasons, the inlet valve may fail to close、This can be due to a malfunction of the valve itself, looseness, or debris blocking the valve、In such cases, simple repairs or replacement of the valve may be necessary.

2、Wear of Inlet Valve Cam

Wear of the inlet valve cam is another cause of the toilet tank continuously filling with water、The cam controls the opening and closing of the inlet valve、When the cam is worn and cannot accurately control the closure of the valve, the toilet tank may experience persistent filling、This issue can be resolved by replacing the inlet valve cam to ensure proper function.

3、Aging of Inlet Valve Sealing Ring

The aging of the inlet valve sealing ring can also lead to the toilet tank continuously filling with water、The sealing ring's purpose is to ensure that no water leaks out when the valve is closed、However, over time, the sealing ring may lose its elasticity due to aging, causing the valve to not fully close and resulting in continuous filling、In this case, replacing the inlet valve sealing ring will restore the valve's normal function.

4、Float Leaking

The float is a critical component that controls the opening and closing of the inlet valve、When the water level drops, the float sinks and opens the inlet valve; when the water level rises, the float rises and closes the inlet valve、However, if the float is damaged or not sealed properly, it can cause the toilet tank to keep filling with water、Checking for leaks or damage in the float and replacing it promptly is necessary to solve the issue.

5、Failure of Inlet Valve Spring

The spring in the inlet valve controls the opening and closing of the valve、When the spring fails, the toilet tank will continuously fill with water、This could result from the spring being loose, worn, or having poor elasticity restoration、The solution to this problem is to replace the inlet valve spring to ensure the valve can close properly.

summary：

the reasons for the toilet tank's water inlet valve continuously filling include the inlet valve not closing, wear of the inlet valve cam, aging of the inlet valve sealing ring, float leaking, or failure of the inlet valve spring、Depending on the specific cause, corresponding measures can be taken for repair or replacement of relevant components to ensure the normal operation of the toilet tank、If you lack experience in repairing the toilet tank, it is best to consult a professional for inspection and repair to avoid damaging other components or causing more serious problems.