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| Water pump selection made easy |
Water pump selection made easy
Water pump confusion removed ... you will hear terms like maximum head, maximum flow and pressure drop when people talk of water pump selection for ponds and water features. We help you out here? |
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No. 1 FOR "C U S T O M E R S A T I S F A C T I O N"
Water pump ... selection introduction |
The points briefly discussed here are considered in far greater detail by following the pond water pump links on this page. This what you need to look for and learn a bit about ... your dealer may not know much more than you so beware
A water pump of the type we will discuss is used extensively in all types of water features. Such a water pump is referred to as a centrifugal water pump ... quite simply this means the pumps has an impellor that spins around and use centrifugal force to deliver water. They are hard to damage because even if the outlet (discharge) from the water pump becomes blocked no damage occurs. In this way flow control is made easy by restricting the outlet pipe using a valve or even by clamping the pipe partly shut.
Using a water pump in ponds means using a submersible water pump in something like 99% of all circumstances ... the pump would normally lie just off the bottom of the pond, completely submersed. Because they are submersed the height a water pump needs to pump against is measured from the water surface and not from the bottom of the pond. This height is normally referred to as "head" in water pump jargon.
Think of a water pump as being able to provide a fixed amount of energy to circulating water. Think of this constant energy derived from the electric motor as being shared out in 2 ways .... water pump energy in part 1 is used to pump volume and the water pump energy part 2 is used to lift that volume. If you give larger share of this energy to volume then the lift has to be less
Here's a simple analogy .. you would need the same energy if you carried one bucket of water up a flight of stairs 20 feet high as you would if you carried 2 buckets of water up a flight of stairs 10 feet high. A water pump is just like this ... if you want to pump more volume higher then get a bigger pump. One size cannot fit all situations for the simple reason the energy from the pump motor is constant in most cases.
You will now understand that to specify and buy a water pump that will do a good job it is necessary to know how much water is to be pumped and how high that volume of water must be pumped. Without both bits of information you cannot specify a water pump accurately.
Now if you want to really explore this further follow the water pump you may check our performance curves & electrical data for more information... but one word of warning here. If you see words like maximum head and maximum volume stated for a water pump these terms have little practical significance and buying on this basis will lead to disappointment and wasted money. |