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Pump Sizing

Determining Pump Size:

  1. Take a filter pressure reading. Or take a reading between the pump and the filter.
  2. If possible, install a vacuum gauge in the pump strainer. There should be a ¼” plug you can pull out, then screw in the vacuum gauge. You don’t need to do this if your pump is below grade. If your pump is on the same level as the pool deck, and you can’t install a vacuum gauge, then add 3’ to 5’ for the vacuum reading.
  3. Enter the pressure reading and vacuum reading into the calculator below.
  4. Press the "Calculate" button.
  5. In sizing a pump, look for a pump that meets the flow rate at your head pressure.
Calculate Total Head Pressure for your Pool