The customer contacted us regarding a significant cockroach infestation inside the home. A pest control company had advised the customer to have the sewer lines evaluated by a plumbing professional to check for possible breaks or issues that could be contributing to the problem. Upon arrival, I spoke with the customer about the concerns and recommended a diagnostic leak search, which included a smoke test and sewer camera inspection. During the smoke test, conducted by pumping smoke through the roof vent stack, smoke was observed escaping from the wall in the laundry room. I then used a sewer camera to inspect the line and identified a break in the cast iron vertical stack. The break was substantial enough to allow pests to enter the home through the sewer system. An estimate for the necessary repairs was provided, approved by the customer, and a deposit was collected. The repair is scheduled to be completed the following day.