TITLE 77: PUBLIC HEALTHHome
PART 890 ILLINOIS PLUMBING CODE
CHAPTER I: DEPARTMENT OF PUBLIC HEALTH
SECTION 890.1330 DRAINAGE FIXTURE UNITS (D.F.U.)
Section 890.1330 Drainage Fixture Units (D.F.U.)
a) Values for Fixtures. Drainage fixture units (D.F.U.) as given in Appendix A: Table E designate the relative load of different kinds of fixtures which 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 drainage fixture units (D.F.U).
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 drainage fixture units shall be considered to be equal to each gallon per minute (gpm) of flow.