18-29-1111.2 Building subdrains.

Not less than two drains shall be installed in roof areas 10,000 square feet (930 m 2 ) or less and not less than four roof drains shall be installed in roofs over 10,000 square feet (930 m 2 ) in area.

18-29-1111 Sumps.

18-29-1111.1 Subsoil drains.

Subsoil drains shall be open-jointed, horizontally spill or perforated pipe conforming to one of the standards listed in Table 18-29-1102.5. Such drains shall not be less than 4 inches (100 mm) in diameter. Where the building is subject to backwater, the subsoil drain shall be protected by an accessibly located backwater valve. Subsoil drains shall discharge to a trapped sump or approved location above ground. The subsoil sump shall not be required to have either a gastight cover or a vent. Access for the purpose of cleaning and removing obstructions in subsoil drains shall be provided at every change of direction.

Building subdrains located below the public sewer level shall discharge into a sump or receiving tank, the contents of which shall be automatically lifted and discharged into the drainage system as required for building sumps.

18-29-1111.3 Pumping system.

The sump pump, pit and discharge piping shall conform to Sections 18-29-1111.3.1 through 18-29-1111.3.4. No sump or receiving tank shall be less than 30 inches (762 mm) deep and shall be in an accessible location.

18-29-1111.3.1 Pump capacity and head.

The sump pump shall be of a capacity and head appropriate to anticipated use requirements.

18-29-1111.3.2 Construction.

Except as otherwise approved by the department of water management, a sump pit shall not be less than 18 inches (457 mm) in diameter and 30 inches (762 mm) deep, and shall be constructed of approved fiberglass, vitrified clay, tile, cast iron, steel, reinforced concrete pipe or other approved material, with a removable cover adequate to support anticipated loads in area of use. Approved plastic or fiberglass liners may be used in connection with any of the above. The pit floor or cover shall provide permanent support for the pump.

(Amend Coun. J. 3-27-02, p. 82090, § 3; Amend Coun. J. 7-29-15, p. 3537, § 4)

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