Video: Defender Evoqua is a self-cleaning and self-purifying perlite water filter for a pool

The Defender Regenerative Media Filter significantly reduces the amount of water required for backwashing associated with the operation of a sand filter.

Instead of backwashing, the Defender filter is programmed for automatic regeneration of fine-grained perlite media for a new cycle. As a result, the filter is easy to operate and requires unloading and replacement of the filtering material only once every 4 weeks, based on the load of pool visitors.