Returned to replace leaking fitting in the wall behind the kitchen sink in unit 109. Opened up a section of drywall behind the drain pipes. Cut out section of abs and cracked fitting. Removed sludge build up from in cast iron fitting. Cut out long turn 90 from the kitchen sink drain pipe going into the wall. Placed mission band couplings on the cast iron fitting to the left of the removed cracked fitting, on the 1 1/2 “ abs line coming from the upper unit, and on the 1 1/2” drain line from the kitchen sink. Installed new long turn 90, and new sanitary tee. Tightened mission bands. Ran water at the kitchen sink and drop tested the kitchen sink while running water from the kitchen, shower, and lavatory faucet in upstairs unit 222. Checked for leaks on repair with none found. Cleaned up work area. Checked for leaks again with none found. Covered up missing dry wall with plastic and painters tape. Thank you for choosing CPI Plumbing and Heating.