At the building drain system's lowest point, the drain-waste vent is attached, and rises (usually inside a wall) to and out of the roof. Waste exits from the building through the building's main drain and flows through a sewage line, which leads to a septic system or a public sewer.t the building drain system's lowest point, the drain-waste vent is attached, and rises (usually inside a wall) to and out of the roof. Waste exits from the building through the building's main drain and flows through a sewage line, which leads to a septic system or a public sewer.
Government debt (also known as public debt, national debt and sovereign debt) is the debt owed by a central government.
For all other uses, see Public law (disambiguation) . Public law (lat. ius publicum) is that part of law which governs relationships between individuals and the government, and those relationships between individuals which are of direct concern to the society.