Hotel/Motel Plumbing Utilizing The Philadelphia Single Stack System
The single stack vent system is based on the theory that the drain lines will be of sufficient size to accommodate solids, liquids and air.
The oldest existing records on file indicate that the General Assembly of the State of Pennsylvania authorized first class cities, which included Philadelphia, to enact rules and regulations governing the installation of plumbing and the examination and licensing of plumbers. This dates back to June 30, 1885.