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Water Filtration in a UK swimming pool

Periods Required

The Effect of the Ambient Temperature

The safe periods of time that a filtration system on a UK swimming pool should be run for is dependent on the water temperature as shown in the following table.

Influence of Bathers

To calculate the influence of bathers using the pool on the required filtration periods just multiply the number of bathers x 2 and divide by the flow rate.

So for instance 6 bathers in a pool with a flow rate of 12 m3 per hour will require an extra 2 x 6 / 12 = 1 hour of filtration.

Number of Bathers allowed

The above rule allows the number of bathers that can use a swimming pool to be calculated

i.e. Number of allowable bathers = Design Flow Rate / 2