All premises intended for human habitation or occupancy shall be provided with a potable water supply. The potable water supply shall not be connected to nonpotable water and shall be protected against backflow and back siphonage in accordance with the requirements of the Illinois plumbing code. Each potable water supply shall provide quantities of water that are sufficient for the drinking, culinary, and sanitary needs of the dwelling or premises served. A minimum system pressure of twenty (20) pounds per square inch shall be maintained throughout each potable water supply. (Ord. 04-199, 5-11-2004)