What are some causes/solutions for poor drainage?
It seems that our house tends to drain water very slowly. The bathroom sink could probably overflow if the water was left on, the bathtub also seems to take a while. Even the kitchen sink seems to drain slowly (though turning on the garbage disposal seems to help).
I've already poured Sulphuric acid down the bathtub, but that hasn't made much of a difference that I could tell.
We have public sewer