Customer had cleanout out backside of kitchen sink. Due to framing and drywall surrounding the cleanout I was unable to unthread the galvanized cap. Had to remove p trap and snake from under kitchen sink. Was unable to perform camera inspection due to the way the drains where plumbed in. Appeared abs MIP was not threaded into galvanized nipple properly as well. Recommended re configuring ABS MIP and 45 to properly plumb in stub out for drain