DE Filters

ProGridDE 2

D.E. Filters

Diatomaceous earth (D.E.) is mined and is the fossilized exoskeletons of tiny diatoms. They are used to coat "grids" in the filter housing and act as tiny sieves allowing for the removal of debris as small as 5 microns. Once the pressure rises, the filter is backwashed just like a sand filter and then "recharged" with more D.E. powder. D.E. filters trap debris as small as 2 - 5 microns.


DE Filter Maintenance

A DE filter offers the best possible filtration, but it also requires the highest level of maintenance. 

Backwash Instructions

DE filters should be backwashed when the pressure rises to 5-7 lbs above “clean operating pressure” or every four to 6 weeks, whichever is sooner.  The DE clean should be done once or twice each year.

A good rule of thumb is to mark or note the “clean operating pressure”.  The “clean operating pressure” is the pressure the system runs at when the de filter grids are fairly new, clean and all the baskets are clean and the pool is set in normal operation.  This “clean operating pressure”, if known, can indicate time for cleaning, time to replace the grids, and/or other problems with the pool or filter.


Filter Cleaning Instructions

If the DE filter goes less than 3-4 weeks between backwashing on a home pool or the pressure is not going down to the “Clean operating pressure”, then it may be time for a DE filter clean.  Most filter manufacturers recommend that the DE clean should be done 1-2 times per year.

Questions? or call (602) 242-5845  * 16427 N Cave Creek Rd, Phoenix, AZ 85032