In general most of the works easy. We just have to find the root of the problem. I saw often people are facing water leakage problems. In general,normally it causes from two things
1. Leaking from the joining thread.
2. Hole or damaged pipe.Solution 1
: Find some "thread tape" on local hardware shop. open the joint, have 2-3 round of thread tape. Screw again the joint you are done.
Solution 2: Unscrew the damaged pipe in both side. Find a new one on appropriate size. Fit it back to the earlier position.
In both cases first of all find necessary tools first.