Top 5 Questions to Ask Before Buying a Submersible Pump
Choosing a submersible pump is a decision you want to get right the first time. Whether replacing an existing unit or specifying one from system schematics, asking the right questions upfront will save you from costly trial-and-error. Let’s break down the 5 essentials every decision-stage buyer should consider.
1. Depth & Static Head
How deep is your well or tank? The Total Dynamic Head (TDH) determines which submersible pump can deliver the required flow. Always compare your depth with the manufacturer’s pump curve.
2. Flow Rate & Peak Demand
What is the peak demand in gallons per minute (GPM)? Undersizing risks shortages, while oversizing wastes energy. Our pump sizing basics guide helps you match demand to pump capacity.
3. Solids Handling
Will the pump need to handle solids? For wastewater or slurry, check maximum solids size, impeller type, and screen options. Pumps with vortex impellers or shredding designs resist clogging better.
4. Duty Cycle & Efficiency
Do you need continuous duty? Applications with long runtimes require motors rated for it and often benefit from variable frequency drives for energy savings. Check cooling method and efficiency class.
5. Materials & Power Match
What’s in your liquid? Abrasive or corrosive fluids call for tougher mechanical seals and stainless or composite construction. Verify motor voltage and phase against your power supply.
Decision Flow: Choose the Right Submersible
Frequently Asked Questions
What depth can a submersible pump handle?
Depends on Total Dynamic Head (TDH). Always check pump curves for max head vs. your required head.
Do I need solids handling?
Yes if pumping wastewater or slurry. Look at maximum solids size and strainer/impeller options.
Is continuous duty necessary?
Yes if the pump will run for long hours. Confirm motor duty rating and cooling method.
