TITLE 77: PUBLIC HEALTH
CHAPTER I: DEPARTMENT OF PUBLIC HEALTH
SUBCHAPTER r: WATER AND SEWAGE
PART 890 ILLINOIS PLUMBING CODE
SECTION 890.1330 DRAINAGE FIXTURE UNITS (DFUS)
Section 890.1330 Drainage Fixture Units (DFUs)
a) Values for Fixtures. Drainage fixture units (DFUs) (see Appendix A.Table E) designate the relative load of different kinds of fixtures that shall be used to calculate the total load carried by a soil or waste pipe, and shall be used with the tables of sizes for soil, waste and drain pipes for which the permissible load is given in terms of DFUs.
b) Values for Continuous Flow. For a continuous or semi-continuous flow into a drainage system, such as from a pump, ejector, air-conditioning equipment or similar devices, two DFUs shall be considered to be equal to each gallon per minute (gpm) of flow.
(Source: Amended at 38 Ill. Reg. 9940, effective April 24, 2014)