As used in this article, the following terms shall have the meanings indicated:
That part of the drainage system extending from three to five feet outside of the building to the connection at the curb or other disposal terminal.
All piping, fixtures, appliances and appurtenances in connection with the water supply and drainage systems with a building.
The construction and connection of any drain or waste pipe carrying domestic sewage to the sewer service lateral at the curb or other disposal terminal, including private domestic sewage treatment and disposal systems and the alteration of any such system, drain or waste pipe, except minor repairs to faucets, valves, pipes, appliances and removing of stoppages.
The water service piping outside of the foundation walls of any building to the mains in the streets, alley or other terminal and the connecting of domestic hot water storage tanks, water softeners and water heaters with the water supply system.
The water pressure system other than municipal systems.
A plumbing and drainage system so designed and vent piping so installed as to keep the air within the system in free circulation and movement, and to prevent with a margin of safety unequal air pressures of such force as might blow, siphon or affect trap seals or retard the discharge from plumbing fixtures, or permit sewer air to escape into the building.
That part of the drainage system extending from the lot line to the connection with the main sewer.