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 Q - Allowance in Equivalent Length of Pipe for Friction Loss in Valves and Fittings
Universal Citation: 77 IL Admin Code § Q
Current through Register Vol. 49, No. 13, March 28, 2025
The following applies to all types of material approved for potable water distribution:
|
Equivalent Feet of Pipe for Various Pipe Sizes |
||||||||
|
Valve or Fitting |
1/2" |
3/4" |
1" |
11/4" |
1 1/2" |
2" |
2 1/2" |
3" |
|
45° ell (wrought) |
0.5 |
0.5 |
1.0 |
1.0 |
2.0 |
2.0 |
3.0 |
4.0 |
|
90° ell (wrought) |
0.5 |
1.0 |
1.0 |
2.0 |
2.0 |
2.0 |
2.0 |
3.0 |
|
Tee, Run (wrought) |
0.5 |
0.5 |
0.5 |
0.5 |
1.0 |
1.0 |
2.0 |
- |
|
Tee, Branch (wrought) |
1.0 |
2.0 |
3.0 |
4.0 |
5.0 |
7.0 |
9.0 |
- |
|
45° ell (cast) |
0.5 |
1.0 |
2.0 |
2.0 |
3.0 |
5.0 |
8.0 |
11.0 |
|
90° ell (cast) |
1.0 |
2.0 |
4.0 |
5.0 |
8.0 |
11.0 |
14.0 |
18.0 |
|
Tee, Run (cast) |
0.5 |
0.5 |
0.5 |
1.5 |
1.0 |
2.0 |
2.0 |
2.0 |
|
Tee, Branch (cast) |
2.0 |
3.0 |
5.0 |
7.0 |
9.0 |
12.0 |
16.0 |
20.0 |
|
Compression Stop |
13.0 |
21.0 |
30.0 |
- |
- |
- |
- |
- |
|
Globe Valve |
- |
- |
- |
53.0 |
66.0 |
90.0 |
- |
- |
|
Gate Valve |
- |
- |
1.0 |
1.0 |
2.0 |
2.0 |
2.0 |
2.0 |
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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