I've seen them systems before. Pretty snazzyThey have an aerobic system, and the installer didn't anchor the filter section when he installed it. So the water table came up, started floating the filter section, and broke the return lines. So they had already fixed the line, but we dug out around it, installed the manufactured wings that are supposed to anchor it, then hauled in some different back fill to replace some of the clay they had, then relaid the sod around it.