Plumbing question: In my bath, water leaks BELOW the sink cabinet. It is definitely not leaking in cabinet. Have to remove cabinet to find?

It can only leak in one of three places. Hot water line, cold water line, drain. That is it. Eliminate one at a time. Shut off the hot water line. Problem solved? If not, shut off the cold water line? Problem solved? If not, then it is the drain....Show more

In mine, the floor of the cabinet lifts out......Show more

plumber will go in via the next room and through wall behind the cabinet. sure, this is possible ......Show more