There is a dripping faucet on the roof of the apartment.

The reason for this is that there is water upstairs, the drain pipe leaks, and the ceiling is noisy.

1. There is stagnant water upstairs: If there is stagnant water upstairs, the water will drip slowly and make a ticking sound. Is the most common reason, especially in rainy season or snow melting season.

2. Drainage pipe leaks: If the drainage pipe leaks, it will also make a ticking sound. It may be caused by aging, wear or rupture of the pipeline.

3. Pipe noise in the ceiling: Sometimes, the drainage pipes or other pipes in the ceiling will generate noise. This sound may be caused by the water flow in the pipeline or the flow of gas or liquid in the pipeline.