How much backwash expansion of the filter media is expected?

The expected backwash expansion of the filter media generally falls within the range of 30-50%. This level of expansion is crucial for the effective removal of trapped particles and debris from within the filter bed. During backwashing, the flow of water through the filter media increases, causing the media to fluidize and expand.

By achieving this level of expansion, the filtration system can ensure that there is sufficient space for the trapped contaminants to be dislodged and carried away, preventing clogs and maintaining the efficiency of the filtration process. This is particularly important in maintaining water quality and ensuring the longevity of the filter media. Options reflecting lower expansion percentages do not take into account the necessary dynamics of backwashing that effectively cleanse and rejuvenate the filtering media, while options with higher percentages may suggest an unrealistic degree of dislodgement and media movement.