Entrance level bathroom group was backing up. Had been snaked 3 weeks ago by a friend of the homeowner. Cables had heavy buildup on them. Suspect line has a belly at or near the group. Tested under running water and multiple flushes for 5 minutes. Draining properly. Spoke with Sharyn and homeowner is available for camera Monday between 9:00-12:00. Warranty pending result of camera inspection. BioClean upgrade added to combat buildup.