We were called out because the roof drain line, that was inside of the orignal brick on the front of the building that ran into the cobble stone street, was leaking into the electrial panel inside of the restaurant. We were able to Hydro jet the line and install a Cure-In-Place liner made by Perma liner industries. We did not have to disturb the brick work or the Cobble stone street. We shot a liner from the street all the way up through the drain line to the roof. The drain line is as good as new. This is just one of the many uses of the Cure-In-Place liner. We were able to fix the problem without disturbing the buildings structure. What a great system!