Where the sanitary drainage system of an existing building is entirely replaced or substantially modified, existing building drains under concrete slabs and existing building sewers that will serve the new or substantially modified system shall be internally examined to verify that the pipe is sloping in the correct direction, is not broken, is not obstructed and is sized for the drainage load of the new or modified plumbing drainage system to be installed. Existing building sewers and drains shall connect with new building sewer and drainage systems only when found by examination and test to conform to the new system in quality of material. The Building Commissioner shall notify the owner to make the changes necessary to conform to this chapter.
(Amend Coun. J. 10-14-21, p. 37722, Art. VII, § 3)