Quality 1st Basements installed another sump pump for me. They had to hammer out some of the existing walls, and then re-cement them. Their foreman was very good, and when the workers put the wall back up a little crooked, he made them redo it. I have the Owens Corning Basement System, and if everything is not back exactly as it was, then the pieces do not fit. I am really glad he was on top of things! So far, everything seems to be fine.