| Le | = | K × I.D. | |
| K | = | Configuration Constant | |
| I.D. | = | Fitting inside diameter measured in feet | |
| Le | = | Equivalent Tubing Length | |
| K values (same size ends) | |||
| 90° Elbow | K = 30 | ||
| 45° Elbow and Sweep elbow | K = 16 | ||
| Tee (flow through run) | K = 20 | ||
| Tee (flow through branch) | K = 60 |
Specify K and I.D. to calculate tubing length
| K | = | Configuration Constant | |
| I.D. | = | Fitting inside diameter measured in feet | |
| Le | = | Equivalent Tubing Length |