- a) General. Distribution boxes may be installed between a septic tank, aerobic treatment plant, NSF International/ANSI Standard 40 wastewater treatment system, and a subsurface seepage system or buried sand filter. If a distribution box is used, it shall be installed level on unexcavated earth, and shall provide equal distribution of flow to the subsequent disposal system.
- b) Connecting Pipe. The pipe connecting the pre-treatment or primary treatment component to the distribution box and the pipe connecting the distribution box to the disposal system shall be watertight.
- c) Construction. Distribution boxes shall be constructed of a durable, watertight, non-corrosive material. They shall be designed to accommodate the necessary distribution lines.
- d) Access. Distribution boxes shall be provided with an opening that will serve as a ready access for inspection, cleaning and general maintenance.
- e) There shall be no connection such as joints, splices or fittings within the area of the overdig around the distribution box.
(Source: Amended at 37 Ill. Reg. 14994, effective August 28, 2013)