Defender® Regenerative Media Filters

Defender®  Energy Savings


The dramatic reduction of backwash waste directly translates to savings in make-up water along with the chemicals and fuel for re-heating. Consider the cost of chemically treating 2.2 million gallons (8328 m3) and the BTU’s required to heat this volume from 50 degrees (10 °C) to 80 degrees Fahrenheit (27 °C)




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This graph illustrates the actual operating pressures of High Rate Sand Filters compared to Defender Regenerative Media Filters.


The RED line represents the fluctuations in PSI for High Rate Sand Filters throughout one complete filter cycle (3 days). The BLUE line indicates the PSI differential for Defender Filters over a similar cycle (21 days).


As a result of the “Bump” cycle, the Defender operates at a dramatically lower head pressure and vastly reduces energy costs. The GREEN shaded area represents the level of lower head requirements which translates directly to dollars saved.


A High Rate Sand Filter, designed at 12 GPM/SF will typically start with a 5 PSI pressure differential, when clean. A pressure differential increase of 10-12 PSI occurs every 3 days, requiring backwashing.


A Defender Filter, designed at 1.3 GPM/SF, will typically start with a 1 PSI pressure differential with new media. Daily pressure differential increase will be 0.25 PSI after bumping. A typical 21 day cycle has yielded a 5.5 PSI pressure differential increase.


All data is provided by Great Wolf Resorts based on actual results of filter systems they operate at various facilities in North America.

Power Savings

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