The well's deep to water is the important feature to deep well pump
Look at your well driller’s well report – it should list the depth to water. If not available, you can easily determine depth to water by tying a small fishing bobber to the end of a piece of string. Lower the string into the well until you feel that the bobber is floating. Take up the slack and mark the string at ground level. Remove the string and bobber, then measure the length from the mark to the bobber.
Choose a pump based on your well’s depth to water:
Depth Type of pump
Less than 25’ Use a shallow well pump
25’ – 110’ Use a deep well pump
25’ – 400’ Use a 4” submersible pump
