Waterfall Pump Calculator
Our waterfall pump calculator will help you determine the amount of water needed to flow over your falls.
Width of the spillway is important to know because you want to produce a sheet of water across the entire width.
As the width increases, the GPH that flow over the spillway will also increase. If the spillway width increases and the GPH does not increase, the sheet of water will become thinner and thinner, not producing the desired effect.
The minumum requirement for a good looking waterfall uses the following formula:
1 inch = 125 GPH
This is output of gallons per hour at the waterfall itself, not what the pump GPH produces. Remember, your pump must lift the water to the top of the waterfall. We have a calculator that determines dynamic head pressure for you.
Example:
- If your waterfall is 4ft high, and you have 20 ft of pipe, 8 fittings, 2 bulkheads, the total equivalent of all of this resistance may be equal to lifting the water 7 ft high.
- All pumps come with a flow chart for you to look up how many gallons your pump output will be at 7ft in height. This will give you the total GPH at the top of the waterfall.