Copper Tubes - Equivalent Length Pressure Loss in Fittings and Valves
Pressure loss as equivalent fittings length to add to actual length piping system:
| Nominal Size (in) | Equivalent Length (feet) | |||||||
|---|---|---|---|---|---|---|---|---|
| 90o Elbow | 45o Elbow | Line 90o Tee | Branch 90o Tee | Ball Valve | Gate Valve | Butterfly Valve | Check Valve | |
| 3/8 | 0.5 | 1.5 | 1.5 | |||||
| 1/2 | 1 | 0.5 | 2 | 2 | ||||
| 5/8 | 1.5 | 0.5 | 2 | 2.5 | ||||
| 3/4 | 2 | 0.5 | 3 | 3 | ||||
| 1 | 2.5 | 1 | 4.5 | 0.5 | 4.5 | |||
| 1 1/4 | 3 | 1 | 5.5 | 0.5 | 0.5 | 5.5 | ||
| 1 1/2 | 4 | 1.5 | 7 | 0.5 | 0.5 | 6.5 | ||
| 2 | 5.5 | 2 | 9 | 0.5 | 0.5 | 0.5 | 7.5 | 9 |
| 2 1/2 | 7 | 2.5 | 12 | 0.5 | 1 | 10 | 11.5 | |
| 3 | 9 | 3.5 | 15 | 1 | 1.5 | 15.5 | 14.5 | |
| 3 1/2 | 9 | 3.5 | 14 | 1 | 2 | 12.5 | ||
| 4 | 12.5 | 5 | 21 | 1 | 2 | 16 | 18.5 | |
- 1 in (inch) = 25.4 mm
- 1 ft (foot) = 0.3048 m
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