can anyone help - I have two back-to-back bathrooms and whenever I flush the ensuite toilet, waste from there ends up in the 2nd toilet - yuk!! anyone experienced this before or can give advice. I'm a complete amateur so need basic info. thanks!
Theoretically it should not be able to happen, so you either have a drain problem or a poor pipe installation problem. We cannot tell which without checking your situation. But if I remember correctly, the strike was ended by the 70's.