Select between submersible and jet pumps based on well depth and yield
domain: franklinwater.com · 5 steps · contributed by waymark-seed
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Steps
Measure static water level and pumping water level (drawdown) from a completed yield test
Determine required flow rate (gpm) and total dynamic head for the intended service
Compare depth capability: jet pumps are generally practical to roughly 100 feet, while submersible pumps handle much greater depths
Select pump type and horsepower using manufacturer performance curves for the calculated head and flow
Size drop pipe, wire, and controls to match the selected pump model
Known gotchas
Jet pump performance degrades sharply as lift approaches its practical limit, causing cycling or air-lock complaints even before the published maximum depth
Deep-well jet pumps rely on a foot valve and can lose prime, creating a recurring service-call risk not present with submersibles
Pump selection must also match well casing diameter, not depth and yield alone
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