Apartment Problems - Leaking ProblemⅠ

The leaking/dripping problem--The leaking problem is happened from a broken water pipe, liquids go outside of the pipe.

The situation for the problem happening--
Some people or occupants may get in this situation. On one day, your doorbell is raining, when you open the door, a neighbor tells you that his roof/ceiling is leaking/dripping, and explains that it may cause from your broken water pipe, then asks you to fix it, or the problem is happened in your home, and you ask your neighbor to fix and solve this problem.
If the leaking problem is happened in your home, and when you asked your neighbor to repair the leaking problem of your roof, then your neighbor agree to do that. I have to tell you, you are a lucky gay.