Ill. Admin. Code tit. 77, pt. 890, subpt. M, app A, tbl. Q - Allowance in Equivalent Length of Pipe for Friction Loss in Valves and Fittings
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 |
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.