| 3 | 4 | 6 | 8 | 10 | 12 | 14 | |
| GPM | 108 | 195 | 440 | 780 | 1200 | 1700 | 2200 |
This table is used to select the size of the sump suction connection. Find the column that shows a GPM not less than the design pump rate and read vertically to locate the minimum allowable pump suction connection size.
| Make up Valve Size | Max. Flow Capacity in GPM at 50 PSI Water Pressure | Max Flow Capacity in GPM at 100 PSI Water Pressure |
| .75 | 40 | 60 |
| 1 | 100 | 150 |
| 1.5 | 180 | 23 |
| 2 | 250 | 350 |
This table is used to select the size of the sump water make-up valve. Select the corresponding size to suit the evaporative coolers’ requirements (ie. evaporation losses,and blow down and bleed.)
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