First off, I love your site, it's the greatest source for plumbing information.
After taking a shower in our upstairs bathroom, we noticed a small leak dripping from the ceiling directly below the wall that contains the plumbing for the shower. The same wall also contains plumbing for a bathtub. The tub and the shower back up to each other against this wall. What is the best way to track down the leak. Do we need to rip out the custom tile shower, the tub, or can we come up through the ceiling? I appreciate your thoughts.