Help! When my washing machine(which is upstairs) is draining and spinning
the water out, the toilet downstairs starts bubbling and gurgling, and some
of the soap bubbles from the washer actually come up into the toilet. The
toilet never overflows, but I'm afraid one of these days it will.
Can anyone tell me what's going on here?? I've used septic tank cleaner and
draino foaming pipe snake, but neither one of these worked.