Construction
Sump Pump Sizing Calculator
Right-size your sump pump so it handles peak inflow without short-cycling or burning out.
Required GPH
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- Required HP
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- Battery backup needed?
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- Sump pit min size
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FAQ
Why is lift so important? +
Pumps lose flow rapidly with vertical lift. A 1/3 HP pump rated 2,400 GPH at 0 ft drops to ~1,500 GPH at 10 ft.
Do I need a backup? +
If you have a finished basement or expensive contents, yes. Battery backup or water-powered backup runs during power outages — when storms hit hardest.