Our house was built in 1937. Sometimes when this particular shower is in use, it leaks heavily into a closet on the 1st floor. Sometimes when the toilet is flushed, same thing. There is a tile floor in the bathroom. Does it sound like we need to rip up the floor to figure out what is going on? We just finished remodeling it... There's about 5 feet between the toilet drain and the shower drain. Thanks for your help.