basement shower backing up - flooding basement
We used an unusual amount of water within a few hours - three dishwasher loads and and a couple of showers - and then later went down to the basement and saw quite a flood. The water is backing up the basement shower drain. Now I see that the water backs up every time we use water, like taking a shower.
Where could the problem be? One of my pipes? Or out below the street? Should I use a drain service or get an ordinary plumber?