§ 2-43. Leaders., Article II. Plumbing and Drainage, Chapter 2. Administration and Enforcement, Code of Ordinances, North Hempstead

Every building, except residential buildings of 2 1/2 stories or less and private garages, shall be kept provided with proper metallic gutters and rain leaders for conducting water from all roofs in such manner as shall protect the walls and foundations from injury. In no case shall the water from any rain leader be allowed to flow upon the sidewalk or adjoining property. The water from leaders may be conducted by proper pipes laid below the surface of the sidewalk to the street gutter upon obtaining a waiver pursuant to § 70-202.2D, or may be conducted by reinforced concrete or PVC pipe to a leaching cesspool or appropriately engineered infiltration landscaping via swale or PVC pipe located at least 10 feet from any building. No plumbing fixtures shall be discharged into a stormwater drywell. Leaders in residential zones may be drained to the surface, rain barrels, dry wells or a combination thereof.

Inside leaders must be made of cast iron or galvanized wrought iron or steel, with roof connections made gastight and watertight by means of a heavy lead or copper-drawn tubing wiped to a brass ferrule or nipple caulked or screwed into the pipe.

Outside leaders may be made of sheet metal.

Rainwater leaders must not be used as soil, waste or vent pipes, nor shall any such pipe be used as a leader.

Where inside leaders are used, Y-branch and bend to the outside wall of the building, 12 inches above grade, must be installed to act as an overflow in case of stoppage.