Submersible Pumps
Submersible pond pumps are a simple way to run a waterfall, stream, or filter. The “right pump” depends on the flow you want (GPH) and your lift + plumbing run (head height).
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Quick links: All Pond Pumps External Pumps Pump Kits UV Clarifiers
Quick sizing tips (simple)
- Start with your goal: waterfall, stream, filter, or a mix.
- Pick a flow target (GPH): bigger waterfall = more flow.
- Measure lift: water level → highest return point.
- Check plumbing: small pipe + lots of elbows = less flow.
- Don’t shop by “max GPH”: pick a pump that hits your target at your real head height.
Want the full walkthrough? How to size a submersible pond pump
Mag-drive pumps are an easy to use solution for small features that don't require large pumping heads. They are easy to repair, clean, and energy efficient. Asynchronous pumps are a hybrid that combine the efficiency of mag-drives with the power of direct drive pumps.
Variable Speed Pumps allow you to adjust the flow of your pump with ease, either through a wired control panel, remote or smart device app.
Direct drive or, motor driven pumps, provide a high torque, high head height and flowrate option. These pumps need to be operated within a specific performance curve to optimize performance and lifespan.
Our premium quality selection of submersible pond pumps for waterfall or filtration applications includes energy efficient, economical and high volume pumps. Our water garden pumps are direct driven or magnetically driven to suit any application.
Buying tips for submersible pond pumps
- Match the job: waterfall pumps handle higher head and flow; mag‑drive pumps are great for smaller features.
- Think “real flow,” not “max flow”: pumps lose flow as lift and plumbing resistance go up.
- Use the right pipe size: undersized pipe can make a strong pump act weak.
- Plan for debris: leaves and string algae can clog intakes—use a skimmer, vault, or pre‑filter when possible.
- Check watts: two pumps may move the same water, but one can cost less to run.
- Don’t forget UV/filter needs: your pump must hit the required flow at your real head height.
Sizing guide (quick steps)
- Pick a target flow (GPH): start with the look you want for the waterfall/stream and any filter/UV requirements.
- Measure lift: from pond water level to the highest return point.
- Add plumbing “drag”: longer runs, smaller pipe, and lots of fittings reduce flow.
- Choose a pump by its chart: the pump must deliver your target GPH at your total head height.
Full step-by-step (with examples): How to size a submersible pond pump
FAQ: How many GPH do I need for a waterfall?
- Low flow: ~750 GPH per foot of waterfall width
- Medium flow: ~1,500 GPH per foot
- High flow: ~2,250+ GPH per foot
Then make sure the pump can hit that flow at your actual head height.
FAQ: Why does my pump feel weak?
- Lift/head is higher than expected
- Pipe is too small or there are too many tight turns
- Intake is clogged (leaves, algae, gravel)
- Filter/UV is restricting flow
