Hi. Is it possible to change a rotted overflow on a tub without any access from underneath or from the other side of the wall? Can it be fixed if tile is removed on the wall above the drain? This tub is an old building on a slab and it's also back to back with another bathroom. All they have is a chase in between the two bathrooms for pipes etc. I just renovated my bathroom and once my new tub etc was installed, we noticed the bathtub on the opposite side had a rotted overflow pipe right where it hooks up to the drain. There was no way to get to it from my side by that point. Will they have to rip apart the bathroom and pull out the tub to fix that?