Apartment Problems- Leaking ProblemⅡ

The usual bad reaction form the leaking problem--
Sometime, no one wants to face this problem. For example, if your roof is leaking, then you ask your neighbor to repair it, he might refuse your request, and tells you why does he have the responsibility to fix it. Or some people may say no problem but they don’t do anything later.
The method for solving the problem--
What should we do when we meet this problem? We could ask a plumbing technician to analyze the problem, after that we could know who is the person has the responsibility to solve the problem. Sometimes, we could fix it then ask the person to pay.
Analysis--
The pipe owner has the responsibility to fix it.
The public pipe, all occupants share the payment, or the community management committee to solve the problem.