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Fountain / Waterfall Pump Selector Calculator -- Use this tool will recommend the correct easy pro pond or fountain pump for your application.  To find the pump, look at the chart, under the column titled "pump" enter the model number of the pump in the search box located on our page's main menu to the left.

Pond Size Calculator -- This tool will help you know approximately how many gallons of water and liner size your project will require.

How to select the correct pump

Determining a pump for your fountain, pond, or waterfall can be difficult if, especially if this will be your first project.  There are several things you should keep in mind with your water feature that will give the best chance that you achieve your desired results.   We will examine the most important considerations for your water feature.

How Much Water Volume Does Your Water Feature Need?

For most residential purposes, the standard typically is that you want about a 1” thickness of waterfall flow for your waterfall.  In order to achieve that, you will need about 36 gallons per minute flow for every 1’ width of waterfall. 

Example: A 3' wide waterfall would need 108 gallons per minute to be 1" thick. 3 FT x 36 GPM = Total GPM 108

Once your width flow requirements have been determined, you will need to know your totals head or lift there will be from the surface of the pond.  In other words, how tall is your waterfall going to be?  If your pond project is small, all you will need to know is the total height of the waterfall or the total vertical lift.  However, if you pond is very large or you plan on making a long winding stream, or the waterfall is located on top of a tall hill, or there are multiple waterfalls, you will then need to factor in the friction loss caused by the pipe and any fittings used in that project.

This Determines Head Pressure...

Once you know this height and you know the volume you need for your water feature, it will make selecting a pump that much easier.  Almost every pump we have listed will have a flow chart. This flow chart will tell you how many gallons per minute or per hour the pump will give you for every foot of lift the pump can push up until its maximum head.  If we use the example above that your waterfall is needing 108 gallons per minute, and your waterfall is 7 feet tall, you will need a pump that can produce a flow of 108 gallons per minute at 7 feet.  What this usually means is that the pump at zero feet will be flowing at more than 108 gallons per minute.  Please note that the depth of the water in where the pumps resides does not factor into the overall head lift of the pump.  It is only counted after the water leaves the surface of the water. 

Now that we know water volume needed and the head height it is needed at, it makes selecting a pump much easier. Start by looking at our pump comparison chart below. This chart lists all of our popular submersible pumps on one page. Look in the grey box on the right side of the chart - find the column of head closest to your application then follow that column down until you find a pump that delivers the gallons per minute (GPM) you need.

The depth of the water where the pump is located does not count towards ft. of head. Ft. of head is the distance the water is lifted above the pond's surface.

The above information is a common guideline for a majority of water feature projects, particularly for pond waterfalls and streams.  If what you are doing is more unique, never hesitate contacting us, and we will be happy to assist you with any project.  It is important to realize the application must have a proper pump.  Not doing so is the leading cause of pump failure.   Please do not hesitate calling us to ensure the correct pump is selected for your project.  Selecting the right pump will increase overall performance.

External Pumps

There are two main types of external pumps:

Self Priming - A self priming pump is placed higher than the water and is able to draw the water without the need to flood the intake line.

Non-Self Priming - These pumps are unable to draw water by themselves and therefore must either be placed below the water level so that the water drains to the pump or if the pump is placed above the water level must have a check valve in order to hold the water in the intake line when and if the pump is shut down.

All external pumps are designed to push water, not pull it. This means the pumps should sit as close to the pond as possible.

Proper Plumbing is Important

Your pump can only perform as well as your plumbing system allows it to.  A common mistake contractors make is that they install pipe that is too small and blame the pump for not yielding enough power. Never size your plumbing based on the pumps outlet rather always size your plumbing for the amount of water your pump is generating.

Maximum water flow for a pipe size of:

1" = 25 GPM

2" = 90 GPM

6" = 700 GPM

1.25" = 45 GPM

3" = 225 GPM

8" = 1500 GPM

1.5" = 60 GPM

4" = 350 GPM

10" = 2500 GPM

If your pump delivers more water than your pipe can handle you will not get the pump's rated amount - you will get the pipe's rated amount.
  Please click for more on pump flow dynamics

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