Chart 3:
| Elbow to Straight Pipe Conversion |
| Diameter |
90° Elbow
1.5 Diameter Rad. |
45° Elbow
1.5 Diameter Rad. |
| 3" |
5' |
2.5' |
| 4" |
6' |
3' |
| 5" |
9' |
4.5' |
| 6" |
12' |
6' |
| 7" |
12' |
6.5' |
| 8" |
15' |
7.5' |
| 9" |
17.5' |
8.75' |
| 10" |
20' |
10' |
| 12" |
25' |
12.5' |
| 14" |
30' |
15' |
Static pressure of two 4" branches (350 CFM each) and one 5" branch (550 CFM) pulling vacuum simultaneously = Total 1,250CFM.