Figure 2: Equivalent Length in Feet for Valves and Fittings
Line Size | Globe Valve | Angle Valve | Short Radius Elbow | Long Radius Elbow |
Inches OD | Equivalent Ft | Equivalent Ft | Equivalent Ft | Equivalent Ft |
1/2” | 43 | 15 | 1.4 | 0.9 |
5/8” | 55 | 18 | 1.6 | 1.0 |
7/8” | 69 | 24 | 2.0 | 1.4 |
1 1/8” | 87 | 29 | 2.7 | 1.9 |
1 3/8” | 102 | 33 | 3.2 | 2.2 |
1 5/8’ | 115 | 34 | 3.8 | 2.6 |
2 1/8” | 141 | 39 | 5.2 | 3.4 |
2 5/8” | 159 | 44 | 6.5 | 4.2 |
Figure 3: Liquid Line Sizing
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| 30 – 65°F Leaving Water Temperature |
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| Liquid Line Size (O.D.”) |
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| Eqiv. FT | 5 hp | 7.5 hp | 10 hp | 15 hp | 20 hp |
| 25 hp |
| 30 hp | 35 hp | 40 hp |
| 25 | 5/8 | 5/8 | 5/8 | 7/8 | 7/8 |
| 7/8 |
| 7/8 | 1 1/8 | 1 1/8 |
| 50 | 5/8 | 5/8 | 5/8 | 7/8 | 7/8 |
| 7/8 |
| 7/8 | 1 1/8 | 1 1/8 |
| 75 | 5/8 | 5/8 | 5/8 | 7/8 | 7/8 |
| 7/8 |
| 7/8 | 1 1/8 | 1 1/8 |
| 100 | 5/8 | 5/8 | 5/8 | 7/8 | 7/8 |
| 7/8 |
| 7/8 | 1 1/8 | 1 1/8 |
| 125 | 5/8 | 5/8 | 7/8 | 7/8 | 7/8 |
| 7/8 |
| 1 1/8 | 1 1/8 | 1 1/8 |
| 150 | 5/8 | 5/8 | 7/8 | 7/8 | 7/8 |
| 1 1/8 |
| 1 1/8 | 1 1/8 | 1 1/8 |
| 175 | 5/8 | 5/8 | 7/8 | 7/8 | 7/8 |
| 1 1/8 |
| 1 1/8 | 1 1/8 | 1 1/8 |
| 200 | 5/8 | 5/8 | 7/8 | 7/8 | 7/8 |
| 1 1/8 |
| 1 1/8 | 1 1/8 | 1 1/8 |
| 225 | 5/8 | 5/8 | 7/8 | 7/8 | 1 1/8 |
| 1 1/8 |
| 1 1/8 | 1 1/8 | 1 3/8 |
| 250 | 5/8 | 5/8 | 7/8 | 7/8 | 1 1/8 |
| 1 1/8 |
| 1 1/8 | 1 1/8 | 1 3/8 |
| 275 | 5/8 | 5/8 | 7/8 | 7/8 | 1 1/8 |
| 1 1/8 |
| 1 1/8 | 1 1/8 | 1 3/8 |
| 300 | 5/8 | 5/8 | 7/8 | 7/8 | 1 1/8 |
| 1 1/8 |
| 1 1/8 | 1 3/8 | 1 3/8 |
Figure 4: Discharge Line Sizing |
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| 30 – 65°F Leaving Water Temperature |
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| Discharge Line Size (O.D.”) |
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| Eqiv. FT | 5 hp | 7.5 hp | 10 hp | 15 hp | 20 hp |
| 25 hp |
| 30 hp | 35 hp | 40 hp |
| 25 | 7/8 | 1 1/8 | 1 1/8 | 1 3/8 | 1 3/8 |
| 1 5/8 |
| 1 5/8 | 1 5/8 | 2 1/8 |
| 50 | 7/8 | 1 1/8 | 1 1/8 | 1 3/8 | 1 3/8 |
| 1 5/8 |
| 1 5/8 | 1 5/8 | 2 1/8 |
| 75 | 7/8 | 1 1/8 | 1 1/8 | 1 3/8 | 1 3/8 |
| 1 5/8 |
| 1 5/8 | 1 5/8 | 2 1/8 |
| 100 | 7/8 | 1 1/8 | 1 1/8 | 1 3/8 | 1 3/8 |
| 1 5/8 |
| 1 5/8 | 1 5/8 | 2 1/8 |
| 125 | 7/8 | 1 1/8 | 1 1/8 | 1 3/8 | 1 3/8 |
| 1 5/8 |
| 1 5/8 | 2 1/8 | 2 1/8 |
| 150 | 7/8 | 1 1/8 | 1 1/8 | 1 3/8 | 1 5/8 |
| 1 5/8 |
| 2 1/8 | 2 1/8 | 2 1/8 |
| 175 | 1 1/8 | 1 1/8 | 1 1/8 | 1 3/8 | 1 5/8 |
| 1 5/8 |
| 2 1/8 | 2 1/8 | 2 1/8 |
| 200 | 1 1/8 | 1 1/8 | 1 3/8 | 1 3/8 | 1 5/8 |
| 1 5/8 |
| 2 1/8 | 2 1/8 | 2 1/8 |
| 225 | 1 1/8 | 1 1/8 | 1 3/8 | 1 5/8 | 1 5/8 |
| 2 1/8 |
| 2 1/8 | 2 1/8 | 2 1/8 |
| 250 | 1 1/8 | 1 1/8 | 1 3/8 | 1 5/8 | 1 5/8 |
| 2 1/8 |
| 2 1/8 | 2 1/8 | 2 1/8 |
| 275 | 1 1/8 | 1 1/8 | 1 3/8 | 1 5/8 | 1 5/8 |
| 2 1/8 |
| 2 1/8 | 2 1/8 | 2 1/8 |
| 300 | 1 1/8 | 1 1/8 | 1 3/8 | 1 5/8 | 1 5/8 |
| 2 1/8 |
| 2 1/8 | 2 1/8 | 2 1/8 |
Chapter 3: Installation | 22 of 78 |