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Pump - to - Waterfall Sizing
The key to a nice waterfall

The flow chart below will list weir widths from 6” wide to 8’ wide and show flows ranging from light to medium heavy. Of coarse you can Using the graph you can determine the appropriate pump to use for your waterfall.

Example: If you have a waterfall that is 1 Ft. wide and you want the water to be 1\2" thick with a 5 ft. vertical (height) the chart calls for a pump that can produce 780 Gallons Per Hour. Look for the model that can give you 780 GPH @t 5 FT. not a 780 GPH pump

 

1\8" Thickness

1\4" Thickness

1\2" Thickness

3\4" Thickness

Weir Width

Light  Flow

Light to Medium Flow

Medium Flow

Medium to Heavy Flow

6 “

60 GPH

120 GPH

360 GPH

660 GPH

1 ft.

120 GPH

240 GPH

780 GPH

1380 GPH

2 ft.

180 GPH

540 GPH

1500 GPH

2760 GPH

3 ft.

300 GPH

780 GPH

2280 GPH

4200 GPH

4 ft.

360 GPH

1080 GPH

3060 GPH

5580 GPH

5 ft.

480 GPH

1320 GPH

3780 GPH

7020 GPH

6 ft.

600 GPH

1620 GPH

4560 GPH

8400 GPH

7 ft.

660 GPH

1860 GPH

5340 GPH

9780 GPH

8 ft.

780 GPH

2160 GPH

6120 GPH

118220 GPH

Note:
After you decide on the thickness and width of your waterfall look for the pump that gives you the appropriate GPH at the HEIGHT of your waterfall.

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