Waterfall Flow Rate Calculator

What pump flow rate do I need for the waterfall width?

Please enter details in the field and the results will be displayed below.

For a projecting waterfall, you need a flow of {{PWAmount}} L/hr (LpH) This flow will ensure the water will leave the wall and project out into the pond.

For a sheer descent waterfall, with no projecting sheet of water, a flow of {{DWAmount}} L/hr (LpH) is required

For higher flow rates, the water will project further into the pond or pool.
Check the pump performance chart to determine which pump will provide adequate flow at the height of the waterfall. Add 30% to the head height to account for sharp bends in the waterfall pipe and losses inside the tubes. Internal diameter 38-40mm pipe is recommended.