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The fi lter that delivers crystal clarity

FNS

®

 Plus

Fiberglass D.E. Filter

By Pentair Pool Products

®

Filtering with diatomaceous earth (D.E.) gives you water 
that really sparkles.  That’s because D.E. filters remove the 
tiniest of contaminants…particles as small as 5 microns. 
(An average grain of sand is 1000 microns!) Even though 
these particles can’t be seen individually, collectively they 
greatly affect water clarity.

Here’s why diatomaceous earth filters work so well. Water 
passes through a series of D.E. coated grids.  Under a 
microscope, D.E. looks like a collection of tiny sponges. And 
just like a sponge, water can pass through, but microscopic 
impurities like dirt, algae, and some forms of bacteria can’t.

FNS

®

 Plus D.E. Filters have been designed with curved grids 

to maximize filtration area.  More filter area means better 
performance and longer periods between cleanings.  Our 
exclusive internal design has been refined to minimize fl ow 
restrictions, and therefore requires minimal pumping power 
to achieve a needed fl ow rate. That means lower utility costs.

In addition to providing the clearest possible water, FNS Plus 
was also designed for easy maintenance and long-term 
reliability.  So you can count on it to keep your pool’s water 
clean and crystal clear for years to come. 

●  

Curved vertical grids provide maximum filter surface area 
for greater dirt-trapping capacity and longer periods 
between cleanings.

●  

Unique internal design ensures optimum filtration and 
backwashing efficiency.

●  

Chemical resistant, fiberglass reinforced polypropylene tank 
for exceptional strength and long life.

●  

Easily removable filter grid pack to simplify maintenance 
and save you time.

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