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P-712.3.2 Sump pit. The sump pit shall be not less than 18 inches (457 mm) in diameter and not less than 24 inches (610 mm) in depth, unless otherwise approved. The pit shall be provided with access and shall be located such that all drainage flows into the pit by gravity. The sump pit shall be constructed of tile, concrete, steel, plastic or other approved materials. The pit bottom shall be solid and provide permanent support for the pump. The sump pit shall be fitted with a gastight removable cover that is installed not more than 2 inches (51 mm) below grade or floor level. The cover shall be adequate to support anticipated loads in the area of use. The sump pit shall be vented in accordance with Chapter 9.
P-712.3.3.1 Materials. Pipe and fitting materials shall be constructed of copper or copper-alloy, CPVC, ductile iron, PE, or PVC. solid wall, galvanized steel pipe or stainless steel pipe for residential applications limited to one- and two-family dwellings. Discharge piping serving or located within occupancies other than one- and two-family dwellings and apartments shall be metallic piping in accordance with this Section.
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P-712.4 Sewage pumps and sewage ejectors. A duplex sewage pump or sewage ejector shall automatically discharge the contents of the sump to the building drainage system. A simplex pump or sewage ejector shall be permitted for one- and two-family dwellings and where serving a single plumbing fixture waste, a single waste receptor or both in all other occupancies.
P-712.4.2 Capacity. A sewage pump or sewage ejector shall have the capacity and head for the application requirements. Pumps or ejectors that receive the discharge of water closets shall be capable of handling spherical solids with a diameter of up to and including 2 inches (51 mm). Other pumps or ejectors shall be capable of handling spherical solids with a diameter of up to and including 1/2 inch (13 mm). The capacity of a pump or ejector based on the diameter of the discharge pipe shall be not less than that indicated in Table 712.4.2.
Exceptions:
1. Grinder pumps or grinder ejectors that receive the discharge of water closets shall have a discharge opening of not less than 1-1/4 inches (32 mm).
2. Macerating toilet assemblies that serve single water closets shall have a discharge opening of not less than 3/4 inch (19.1 mm). and shall be limited to use in one- and two-family residential dwellings only.
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Notes
| 391 | Added,
Bill No. 230653 (approved December 20, 2023), effective April 1, 2024. |