WATERCOURSE pump selection charts.
Which pump is right for your waterfall or stream?
These charts serve as recommendations for selecting the right pump for your watercourse (average watercourse application). In these calculations approx. 5 metres of a 1½" hose are used (with a pressure loss of approx. 0.15 head height).
Here is a rule of thumb for choosing the correct pump for a waterfall or stream
Width of  watercourse in cm x 1.5 litres / minute = Pump Flow Rate required in litres per minute.

so the wider your stream or waterfall, the larger pump flow rate required

Eg 50cm wide waterfall will require flow rate of 50 X 1.5 = 75 litres per hour required at the correct height.


waterfall pump selection1
Example: using the above chart with can use Aquamax Eco Classic 8500 pump for a waterfall width of 800mm at 500mm head height.
waterfall calculation 2
Example: using the above chart with can use Aquamax Eco Premium 12,000 pump for a waterfall width of 800mm at 1,500mm head height.
large waterfall pump size
Example: using the above chart with can use an Aquamax  Eco Twin 30,000 for a waterfall width of 800mm at 3,500mm head height or the same pump for a waterfall 2,200mm wide at 1,000mm head height.
powerfull waterfall pump size
Example: using the above chart with can use Aquamax  Expert 40,000 pump for a waterfall width of 2,500mm at 5,000mm head height.