Performed work as proposed. Repaired section of abs drain piping that was leaking. Removed abs fittings and piping and installed new section of pvc drain piping. Verified no leaks present. Used camera through outside clean out verifying mainline is clear from outside clean out 120 feet out. Mainline is leaking from inside foundation will work on providing estimate to repair leaking in foundation. This is also located underneath stairway outside before outside clean out. Thank you for choosing CPI plumbing and Heating.