Performed troubleshoot to determine where leak was coming from. Pinpointed leak to upstairs tub drain. Water is leaking from the drain and leaking down into the basement. Recommend replacement of as much cast iron as possible. Cutting the wall will be necessary to access drain line for replacement. Provided customer with two options: one where he removes all necessary drywall and one where TE removes all drywall needed Also, provided estimates for replacing the waste and overflow for the tub as well as replacing the shower valve and trim kit as additonal items that can be performed while the drywall is open Thanks for choosing TE Certified