Conversion Chart - Pressure Conversion (feet of water to pounds per square inch)
Based on formula (psi) = Pressure Head (feet of water) x 0.433
| Pressure Head | Pressure | Pressure Head | Pressure | Pressure Head | Pressure |
| (Ft. of Water) | (psi) | (Ft. of Water) | (psi) | (Ft. of Water) | (psi) |
| 0 | 0 | 200 | 87 | 410 | 177 |
| 5 | 2.2 | 210 | 91 | 420 | 182 |
| 10 | 4.3 | 220 | 95 | 430 | 186 |
| 20 | 8.7 | 230 | 100 | 440 | 190 |
| 30 | 13 | 240 | 104 | 450 | 195 |
| 40 | 17 | 250 | 108 | 460 | 199 |
| 50 | 22 | 260 | 113 | 470 | 203 |
| 60 | 26 | 270 | 117 | 480 | 208 |
| 70 | 30 | 280 | 121 | 490 | 212 |
| 80 | 35 | 290 | 126 | 500 | 216 |
| 90 | 39 | 300 | 130 | 550 | 238 |
| 100 | 43 | 310 | 134 | 600 | 260 |
| 110 | 48 | 320 | 139 | 650 | 281 |
| 120 | 52 | 330 | 143 | 700 | 303 |
| 130 | 56 | 340 | 147 | 750 | 325 |
| 140 | 61 | 350 | 151 | 800 | 346 |
| 150 | 65 | 360 | 156 | 850 | 368 |
| 160 | 69 | 370 | 160 | 900 | 390 |
| 170 | 74 | 380 | 164 | 950 | 411 |
| 180 | 78 | 390 | 169 | 1000 | 433 |
| 190 | 82 | 400 | 173 | ||