Illinois Administrative Code
Title 77 - PUBLIC HEALTH
Part 890 - ILLINOIS PLUMBING CODE
Subpart M - INSPECTIONS, TESTS, MAINTENANCE AND ADMINISTRATION
Appendix A - Plumbing Materials, Equipment, Use Restrictions and Applicable Standards
Table H - Horizontal Fixture Branches and Stacks
Universal Citation: 77 IL Admin Code § H
Current through Register Vol. 49, No. 13, March 28, 2025
|
Maximum Number of Drainage Fixture Units (D.F.U.) That May be Connected to: |
||||
|
More than 3 Stories in Height |
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|
Diameter of Pipe (inches) |
Any Horizontal Fixture Branch |
One Stack of 3 Stories in Height or 3 Intervals |
Total for Stack |
Total at One Story or Branch Interval |
|
11/4 |
1 |
2 |
2 |
1 |
|
11/2 |
3 |
4 |
8 |
2 |
|
2 |
6 |
10 |
24 |
6 |
|
21/2 |
12 |
20 |
42 |
9 |
|
3 |
201 |
302 |
602 |
161 |
|
4 |
100 |
240 |
500 |
90 |
|
5 |
360 |
540 |
1,100 |
200 |
|
6 |
620 |
960 |
1,900 |
350 |
|
8 |
1,400 |
2,200 |
3,600 |
600 |
|
10 |
2,500 |
3,800 |
5,600 |
1,500 |
|
12 |
3,900 |
6,000 |
8,400 |
1,500 |
|
15 |
7,000 |
- |
- |
- |
1 Not over two water closets.
2 Not over six water closets, or more than two per branch interval or per floor.
Disclaimer: These regulations may not be the most recent version. Illinois may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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