Sand filter systems

How to choose a pool filter with the right capacity?

Required flow depends on pool volume and the chosen circulation time. The calculation below uses a four-hour circulation time as an example, not a minimum requirement for every pool. Consider the filter’s permitted flow, pipe resistance and pump performance under actual operating conditions.

Calculation example:

• Pool dimensions: width 4m, length 8m, depth 1.50m.
• Pool volume: 4m x 8m x 1.50m = 48 m³
• Calculation of required pump capacity: 48 m³ ÷ 4 hours = 12 m³/h

In this example, the pool pump would need an actual flow of 12 m³/h through the filter system to meet the example’s four-hour target.