How to Choose Fountain Pump Replacement?

How to Choose Water Fountain Pump Replacement?

It is essential to select the right fountain during replacement to ensure a smooth optimal
flow of water. A too-large outdoor fountain pump makes the water splash out of the
fountain, and too little flow and the water cannot reach the fountain’s top. We make some
suggestions for fountain pump size below.

Make Sure You Need a Replacement

Always troubleshoot the problems before considering a water fountain pump replacement.
It could be fixable issues like clogging or issues with the power cord. Try plugging the pump
into another power outlet to make sure the power source is not the problem. If an impeller
is sticking, you can first try to plug, unplug, plug, unplug a few times to see if the problem is
fixed. If the pump still does not work, you might merely need a new impeller. We have
created a video here on how to remove an impeller for most fountain pumps.

Selecting a Fountain Pump

To select a water fountain pump replacement for an outdoor fountain pump, first, decide
the one you need, whether standard submersible or in-line (out of water). The next thing
you need to know is how high the water must go from the surface of the water feature’s
basin to the filial (the highest point of the fountain).


They are the smallest fountains that sit on tables. The flow rate is usually about 35-80
gallons per hour (GPH), and the pumping height is typically between one inch to sixteen
inches. Again, if you buy too large of a pump, there could be splash.

Small Fountains

They are slightly larger than the tabletop fountains. The pumping height is approximately 1-3
feet in height, and the flow rate is typically between 70 and 170 GPH.

Medium Fountains

The pumping height can be anywhere from 1 foot to 5 foot and the flow rate is typically
between 150 and 300 GPH.

Large Fountains

They are the largest fountains supporting a pumping height of 7-ft, sometimes as high as 15 feet,  and a flow rate of 300 to
2500  GPH.

Besides these sizes, the following are the factors to consider when choosing a pump;

Water Volume

Larger water volumes require large pumps. Find out the volume of a pond in gallons by
multiplying the width feet by length feet by average depth feet by 7.5. If the result is 300
gallons and requires a two-hour interval water circulation, a pump with a 150GPH flow rate
is appropriate.

Water Type

The flow rate depends on the function. Waterfalls and those with skimmers require
circulation at the one-hour interval. Ponds with fish should circulate every hour while those
without circulate every two hours. Small water bodies about 250 gallons should allow water
circulation once an hour, while the larger require circulation half the rate of the smaller


Fountains requiring high water pressure need more robust pumps. Pumps have head heights
that help in determining their suitability. The vertical height in which water will travel and
1/10 of horizontal distance from the pump determine the minimum head height.

Discharge Diameter

The tubing size and the discharge diameter should match to ensure an accurate flow rate.
Water Function

Aeration is necessary for water housing fish and other animals. Larger pumps enhance water
circulation, which promotes filtration and ventilation. More fish survive in ponds with large

Replacement fountain pump selection may be intimidating, mainly because the fountain comes with the pump during the original purchase. To select a replacement for an outdoor fountain pump, first, decide the one you need. Whether standard submersible, in-line cable, or low water shut-off pumps. A little research may reduce the struggle of getting the right item.