Counter Current Swimming Pool Pumps
Counter current swim pumps or resistance swimming aparatus are designed to allow proper swimming in a small pool. The pump system creates a current for the swimmer to swim against.
These types of equipment first appeared in the 70´s and there have been several attempts to try to make them better and improve them by making the current smoother.
There are either pressure driven machines or volume driven machines to choose from.
Pressure driven machines are the most common using a pump to create a jet of water, whereas volume driven machines rely on a paddle to generate the current.
The instalation of these into an existing pool is not straight forward as pipe work has to be put through the side of the pool. Typically these pipes are 75mm in diametre.
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Propellor type swim pump
These systems are sometimes installed and sold in a large jacuzzi and marketed as a swim spa. Pictured below is the SmartPools version.

