Pump Selection Page

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Read After the Pump Selector For A Note About Flow Rates

External Sequence Pumps Link to Sequence Detailed Specifications Web Site

External PerformancePro Pumps Link to PerformancePro Detailed Information

Aqua UV Ultima II Filter Selection Link to Aqua UV Web Site

The Maximum Flow figures given on the actual pump selection pages are based on your pump being close to your pond (so it does not have to PULL the water very far, since these high volume, low pressure pumps do not pull water nearly as well as they PUSH the water on the output side) and are also based on not having to push the water extremely high (high volume, low pressure pumps are not designed to push water to the top of a tall building!)

A PERSONAL NOTE is that for our OWN POND we use a pump that is one step up from the minimum size required for the filter... it is easy to put a PVC valve on the output of the pump to reduce the flow if needed, but expensive to replace a pump if you find that the total flow reduction of your plumbing leaves you with a system which does not flow enough water

The exact amount of water moved in your pond/pump/filter depends on MANY factors:

• The distance the pump needs to PULL water out of the pond, with the pump working much better if it is at, or even below, the water level of the pond, and also as close to the pond as possible (while the exact distance will vary, there IS a maximum distance a pump will prime and pull the water into the pump - I am not able to state that maximum, since each installation's plumbing details are different, so just remember that your pump needs to be close to your pond, with as few bends in the plumbing as possible)
• The distance and height the pump needs to PUSH the water, with effective water flow decreasing the further/higher the water is being moved before being returned to the pond
• The size of the water pipe being used, so if you neck-up right at the 1.5 inch pump fitting into a 2 inch water line, you will have less friction loss, especially over longer distances
• The number and type of bends in your water pipe, with each 90 degree bend causing a slight friction loss (it is slightly better, if you have space, to use two 45 degree bends in place of one 90 degree bend)
• Any restrictions due to using an enclosed, pressurized filter, such as the Ultima II filters mentioned on another of our pages, will mean that you should use at least "one size up" pump to accomodate the filter's requirements (such as a pond that could use a 5,000 GPH pump with an open filter, should use a 6,000 GPH filter with a pressurized bead filter)
• The Max Head number is, basically, a figure based on raising water straight up, but since few of us build ponds on the roof or at the top of a tree, the effective meaning of Max Head in pond construction is that if you have your pump at the low end of a sloping yard, pumping water to a waterfall at the high end of the yard, you will pump X gallons of water through Y feet of pipe that rises Z feet from the low to high levels. (Again, I can't give you exact figures)
• A general "rule of thumb" is that pumping water through 50 feet of 1.5 inch pipe is "about" the same as pumping that water straight up a distance of 10 feet, so if you are pumping your water 50 feet on the level, and then up 5 feet at the end, your total "head" would be approximately 15 feet, and your effective flow would be MUCH less than if you were only pumping a few feet.
• Add to that the effect of using elbows (a 90 degree elbow is roughly equivalent to adding 5 feet of pipe) and you can see that only a few elbows in your plumbing will quickly add up to a significant friction loss. All of this means that you should design your pond plumbing to put your pump as close as possible to both the pond and the filter, and you should use as few bends as you can.
• Sequence pumps have the Maximum Flow as the left number of the model and the Maximum Head as the right number of the model, so the 5800SEQ23 Pump has a Maximum Flow of 5,800 Gallons Per Hour (measured right at the pump outlet) and a Maximum Head height of 23 feet
• Finally, a PERSONAL NOTE is that for our OWN POND we use a pump that is one step up from the minimum size required for the filter... it is easy to put a PVC valve on the output of the pump to reduce the flow if needed, but expensive to replace a pump if you find that the total flow reduction of your plumbing leaves you with a system which does not flow enough water

Filtration starts with a Priming Pot (for external pumps)
Why You MUST Have a Priming Pot

Select a pump to match your desired amount of water flow
Selecting a Pump for the size of your pond

Select a UV Light to match the size of your pond
Selecting a UV Light for the size of your pond

Select an ULTIMA II filter to match the size of your pond
Selecting an ULTIMA II filter for the size of your pond