Hit Loss in watts per meter of pipe based on different pipe sizes and temperature difference between water temp. & ambient temp.
| Hit Loss Table (Watts per Meter) | |||||||||||||
| PIPE TYPE | SDR 11 | SDR 13.5 | |||||||||||
| Pipe Size (inch) | 1/2″ | 3/4″ | 1″ | 1 1/4″ | 1 1/2″ | 2″ | 1/2″ | 3/4″ | 1″ | 1 1/4″ | 1 1/2″ | 2″ | |
| Pipe Size (mm) | 15 | 20 | 25 | 32 | 40 | 50 | 15 | 20 | 25 | 32 | 40 | 50 | |
| K Value | 3.58 | 4.35 | 4.39 | 4.38 | 4.37 | 4.39 | 4.53 | 5.47 | 5.47 | 5.48 | 5.48 | 5.48 | |
| Tempreture Difference between Fluid and Ambient (T1-T2) | 5 | 17.9 | 21.8 | 22 | 21.9 | 21.9 | 21.9 | 22.7 | 27.4 | 27.4 | 27.4 | 27.4 | 27.4 |
| 10 | 35.8 | 43.5 | 44 | 43.8 | 43.7 | 43.8 | 45.3 | 54.7 | 54.7 | 54.7 | 54.8 | 54.8 | |
| 15 | 53.7 | 65.3 | 65.9 | 65.7 | 65.6 | 65.8 | 68 | 82.1 | 82.1 | 82.2 | 82.2 | 82.2 | |
| 20 | 71.7 | 87.1 | 87.9 | 87.6 | 87.5 | 87.7 | 90.6 | 109.4 | 109.5 | 109.5 | 109.6 | 109.6 | |
| 25 | 89.6 | 108.8 | 104.9 | 107.5 | 109.3 | 109.6 | 113.3 | 136.7 | 136.8 | 136.9 | 137 | 137 | |
| 30 | 107.5 | 130.6 | 131.8 | 131.4 | 131.2 | 131.6 | 136 | 164.1 | 164.2 | 164.3 | 164.4 | 164.4 | |
| 35 | 125.4 | 152.4 | 153.8 | 153.4 | 153 | 153.5 | 158.6 | 191.5 | 191.6 | 191.7 | 191.7 | 191.8 | |
| 40 | 143.3 | 174.2 | 175 | 175.3 | 174.9 | 175.4 | 181.2 | 218.8 | 219 | 219.1 | 219.1 | 219.2 | |
| 45 | 161.2 | 195.9 | 197.7 | 197.2 | 196.7 | 197.4 | 203.9 | 246.2 | 246.3 | 246.4 | 246.5 | 246.6 | |
| 50 | 179.1 | 217.7 | 219.7 | 219.1 | 218.6 | 219.3 | 226.6 | 273.5 | 273.7 | 273.8 | 273.9 | 274 | |
| 55 | 197.1 | 239.5 | 241.7 | 241 | 240.5 | 241.2 | 249.2 | 300.9 | 301.1 | 301.2 | 301.3 | 301.4 | |
| 60 | 215 | 261.2 | 263.7 | 262.9 | 262.3 | 263.2 | 271.9 | 328.2 | 328.4 | 328.6 | 328.7 | 328.8 | |
| 65 | 232.9 | 283 | 285.6 | 284.8 | 284.2 | 285.1 | 294.5 | 355.5 | 355.8 | 356 | 356.1 | 356.2 | |
| 70 | 250.8 | 304.8 | 307.6 | 306.7 | 306.1 | 307 | 317.2 | 382.9 | 383.2 | 383.4 | 383.5 | 383.6 | |
| 75 | 268.7 | 326.5 | 329.6 | 328.6 | 327.9 | 328.9 | 339.8 | 410.2 | 410.5 | 410.7 | 410.9 | 411 | |
| 80 | 286.6 | 348.3 | 351.5 | 350.5 | 349.8 | 350.9 | 362.5 | 437.6 | 437.9 | 438.1 | 438.3 | 438.4 | |