As used in this article, unless a different meaning clearly appears from the context, the following words shall have the meanings given:
The lowest horizontal piping of a drainage system within a building, which receives and conveys rainwater, groundwater, subsurface water, condensate, cooling water and other similar liquids.
The sanitary sewer pipe leading from the main connection with the house plumbing system. House lateral will include any "T" or "Y" branches and any coupling devices utilized to connect house lateral sewer to the main sewer or lateral sewer.
The system of sewer pipes within a house or other building.
Sanitary sewer pipe laid in the street to which house laterals are attached.