Hi...I hope I am posting in the correct forum. I have a inground vinyl liner pool in South Jersey and I am getting water behind the liner in my shallow end. Its causing a softball sized hole (or bigger by now) to erode where the floor meets the wall. I had the pool builder out to repair but water was flowing in at the time and I need to address the drainage issue. Does anyone know of a reputable company in the Philadelphia/South Jersey area that could install some type of sump pump system ? Or know of what my options are. Thanks in advance.