I have an apartment building where my sewer lines runs out the back and under the house on the other side of the block and out the front of that house then under the street. Don't know if the other house connects to it or not. Never had trouble with it. The town wants me to disconet the rain gutters from it. This house goes right up to the property line and has no yard! If I diconect them all the water will go into the sidewalk and down into the nabors house. Then I will have trouble!