The water tank of the toilet keeps filling, so it is necessary to determine the cause of the problem first. It may be that the float inside the water tank is damaged or stuck, which leads to the failure of the water inlet valve, or it may be that the water inlet valve itself has failed. Checking the components inside the water tank, observing the state of the float and whether the inlet valve is abnormal can help us determine the source of the problem.

Clean or replace faulty parts.

Once the cause of the problem is determined, the next step is to clean or replace the faulty parts. If the float is stuck or damaged, you can try to clean it to make it work normally. If the inlet valve is damaged beyond repair, it needs to be replaced. You can buy new parts according to the model and specifications of the toilet and replace them according to the steps in the manual.

After repairing or replacing the faulty parts, retest the function of the toilet. Open the water inlet valve and observe whether the water tank continues to be filled with water. If the problem of water in the water tank is solved, the water level will be adjusted next. The water level can be controlled by adjusting the position of the float or the adjusting screw of the water inlet valve. Ensure that the water level in the water tank is within a suitable range, which can not only meet the washing demand, but also not waste too much water resources.

(Note: As the video cannot be added to the reply text, the real maintenance video cannot be provided. The above is a written description of the solution for repairing the toilet tank. )