Waste Pipe.—A vertical pipe in a building through which waste water containing no fecal matter is allowed to flow.
House Drain.—The approximately horizontal portion of a house drainage system which conveys the drainage from the soil stack or waste pipe to the point of discharge from the building.
House Sewer.—The pipe which leads from the outside wall of the building to the sewer in the street.
Lateral Sewer.—The smallest branch in a sewerage system, exclusive of the house sewers.
Sub-main or Branch Sewer.—A sewer from which the sewage from two or more laterals is discharged.[[10]]
Main or Trunk Sewer.—A sewer into which the sewage from two or more sub-main or branch sewers is discharged.[[11]]
Intercepting Sewer.—A sewer generally laid transversely to a sewerage system to intercept some portion or all of the sewage collected by the system.
Relief Sewer.—A sewer intended to carry a portion of the flow from a district already provided with sewers of insufficient capacity and thus preventing overtaxing the latter.[[12]]
Outfall Sewer.—That portion of a main or trunk sewer below all branches.
Flushing Sewer.—A conduit through which water is conveyed for flushing portions of a sewerage system.