Pond waterfall pump
Updated: 22 October 2026
You want a sheet of water across a lip or a short stream, and the pump title is a litres-per-hour figure measured with almost no lift. A pond waterfall pump has to deliver the flow at the top, after the height and the hose have taken their share. Filter turnover is a different sum. The rows, with their stated heads and missing charts, are the [pond pump comparison](/hub/garden-ponds/pond-pump). Peter F. used saved amazon.co.uk listings as of 21 October 2026. This is not a measured waterfall. A qualifying purchase can earn us a commission at no extra cost to you.
You want a sheet of water across a lip or a short stream, and the pump title is a litres-per-hour figure measured with almost no lift.
You want a sheet of water across a lip or a short stream, and the pump title is a litres-per-hour figure measured with almost no lift. A pond waterfall pump has to deliver the flow at the top, after the height and the hose have taken their share. Filter turnover is a different sum. The rows, with their stated heads and missing charts, are the pond pump comparison. Peter F. used saved amazon.co.uk listings as of 21 October 2026. This is not a measured waterfall. A qualifying purchase can earn us a commission at no extra cost to you.
Our top picks
| Badge | Product | Max flow | Max head | Hose | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  PondXpert PondXpert Mighty Mite 2000 | 2,000 L/h | 2 m | 20–32 mm tails | 6.7 | about £49.99 | View offer |
 Knifel Knifel 2500 L/h pond pump | 2,500 L/h | 2.5 m | Hose and 3 nozzles | 8.5 | about £27.99 | View offer | |
| Alternative |  HOCANFLO HOCANFLO 11000 L/h pond pump | 11,000 L/h | 3.5 m | 1-1/2 inch adapters | 7.2 | about £129.99 | View offer |
On this page
Width sets the flow at the lip
The flow you need is set by the width of the spill and by whether you want a trickle or a sheet. UK guides do not use one number.
Pond Planet uses 1.5 litres per minute for each centimetre of width, which is 90 L/h per centimetre. A 10 cm lip is 900 L/h at the top, described as a minimum. A 30 cm lip is 2,700 L/h at the top. That flow is the water at the discharge, not the zero-head figure on a box.
Water Garden uses about 1,000 L/h per 10 cm for a gentle brook and about 2,000 L/h per 10 cm for a stronger flow. A 50 cm spill at 1,500 L/h per 10 cm is their 7,500 L/h example at the discharge, before a pump is named. A 30 cm lip can be about 2,700 L/h, 3,000 L/h or 6,000 L/h, depending on the guide and the look. Choose the look first. The pump has to be larger than that target once the outlet is above the pond.
Height and hose steal that flow
Measure from the water surface to the lip, not from the pond floor. A lip 0.8 m above the surface is 0.8 m of lift even if the pond is 1.2 m deep. At maximum head, flow is about zero. Turnover stays on what size pond pump do I need.
Hose bore matters as much as length. Water Garden contrasts a 25 mm hose with a 40 mm hose on the same rise. Only the Mighty Mite states tails, at 20–32 mm. HOCANFLO states adapters for 1-1/2 inch pipe. A fountain nozzle set is not a waterfall bore. Stepping down to 20 mm tails is the high-friction end of that illustration.
A title of 3,000 L/h and a maximum head of 2.5 m does not deliver 2,700 L/h at a lip 1 m up with several metres of hose. If the only stated head is close to your lift, you are near the trickle. This set does not print the quarter-points.
One pump or a separate spill pump
A tee that feeds a filter and a waterfall does not split in half. That Pond Guy’s point is that the easier branch takes more of the flow. A short, wide spill hose starves a long filter hose. Throttling the spill to save the filter turns the lip into a dribble. Title litres added together are not a fair tee.
Use two pumps when the jobs disagree. The filter pump stays on. The waterfall pump can be switched off, including overnight, if the filter is happy on its own. If the filter maximum is 2,000 L/h and the lip wants 6,000 L/h, one pump cannot meet both limits. Fountain nozzles are a different intake, on fountain pump or filter pump. Owner notes of a 0.5 m spill or a 3 m cascade are not a curve, and a HOCANFLO review that mentions a waterfall also says there is no output control.
What this set can support
These listings can state a maximum head. They cannot promise 7,500 L/h at 1 m. Single heads that could matter for a low spill are Mighty Mite at 2 m, AQQA and the Knifel 2500 L/h pump at 2.5 m, and HOCANFLO at 3.5 m. None prints the flow at 0.5 m or at 1 m. HOCANFLO’s 11,000 L/h is the open-discharge end, not the flow at 3.5 m. Pontec and POPOSOAP have no head, so they cannot be sized to a lip from the listing.
A 32 mm Mighty Mite tail is still narrower than a 40 mm waterfall hose. HOCANFLO’s 1-1/2 inch adapters are the closest wider pipe, still without a chart. Flintronic at 1.6 m and 800 L/h is a bowl pump, not a 30 cm lip, which is why it is not in the table. PTSBENCO’s 1.5 m against up to 2 m is not a planning figure. Do not invent the middle, and do not import an Oase model as one of these ASINs.
Common questions
How much flow does a given spill width need?
It depends on the look. Pond Planet’s minimum is 1.5 L/min per centimetre of width, which is 90 L/h per centimetre, so 10 cm wants 900 L/h at the top. Water Garden uses about 1,000 L/h per 10 cm for a gentle flow and about 2,000 L/h per 10 cm for a stronger one. A 50 cm spill at 1,500 L/h per 10 cm is their 7,500 L/h example, at the discharge, before head loss and before a pump is named.
Do I measure head from the pond floor?
No. Measure from the water surface up to the lip or the outlet. Pond depth is how deep the water is, not how high the pump has to lift it. A 0.5 m deep pond with a lip 1 m above the surface is a 1 m lift, plus hose loss. At the pump’s stated maximum head, expect about zero flow.
Why will the pump deliver less at the top than the box says?
The box prints the high-flow, low-lift end of the curve. Raising the outlet moves you towards the maximum-head end, where flow collapses. Hose length and a narrow bore move you the same way. A title of 11,000 L/h with a 3.5 m maximum head does not mean 11,000 L/h at 3.5 m, or at 1 m. Without a chart you only know the two ends.
Can one pump feed both the filter and the waterfall?
It can be piped that way, and the split will not be even. The easier branch takes more of the water, so one side is overfed and the other is short. If the lip needs more flow than the filter is allowed to receive, one pump cannot meet both limits. A separate waterfall pump that you can switch off leaves the filter running on its own turnover.
Which listings in this set even state a head?
A single head is stated for HOCANFLO at 3.5 m, the Knifel 2500 L/h pump and the AQQA at 2.5 m, the Mighty Mite at 2 m, and the flintronic at 1.6 m. Pontec and POPOSOAP state none. Knifel 1500, PTSBENCO and Homvik print more than one head and do not reconcile them. None of the ten prints litres at 1 m.
What hose size does this set actually name?
The Mighty Mite names tails from 20 mm to 32 mm. HOCANFLO names adapters for 1-1/2 inch pipe. The fountain-style listings name nozzles, not a waterfall bore. A 25 mm hose will waste more of your flow than a 40 mm hose on the same rise. Stepping down to the only tails in the set is a friction choice, not a free match to a wide spill.
What must I not invent without a curve?
Do not invent a flow at 1 m for any of these pumps, and do not treat HOCANFLO’s 11,000 L/h as the delivery at 3.5 m. Do not claim the Mighty Mite still has a stated output at 0.5 m or on a 3 m cascade. Do not import an Oase model from a shop guide. Owner reviews that mention a waterfall are not a performance chart.
Related pages
Sources
Public UK sources for this comparison. Listings and prices were taken from amazon.co.uk on 21 October 2026.
- Pond Planet: what size pump do I need (retrieved 21 October 2026)
- That Pond Guy: head height and flow (retrieved 21 October 2026)
- Pondone: pump lift (retrieved 21 October 2026)
- Electrical Safety First: garden electrics (retrieved 21 October 2026)
- IET Wiring Matters: 30 mA RCD for outdoor equipment (retrieved 21 October 2026)
- GOV.UK: Electrical Equipment (Safety) Regulations 2016 (retrieved 21 October 2026)
- Approved Document P, 2013 (retrieved 21 October 2026)
- RHS: wildlife ponds (retrieved 21 October 2026)