The upstairs shower/tub in my condo leaks down onto my garage floor. I’ve already tried filling up the bathtub and letting the water drain to see if the drain was leaking, and I’ve re-grouted the tile and caulked around the tub. It only seems to be leaking when the shower is in use. I’m thinking it might be where the shower head connects to the pipe behind the wall. There is a water stain on our kitchen ceiling directly below the bathtub, but the majority of the water still winds up on the garage floor, underneath the kitchen. Help ! !