Pentair FNS Plus D.E. Filters

The pool filter that delivers crystal clarity

Filtering with diatomaceous earth (D.E.) gives you water that really sparkles. That's because Pentair FNS D.E. filters remove the tiniest of contaminant 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.

Pentair FNS Plus D.E. Filters have been designed 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 flow restrictions, and therefore requires minimal pumping power to achieve a needed flow rate. That means lower utility costs.

Pentair FNS Plus Features

• 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.

The culmination of 40 years of pool filter experience

The FNS Plus filter's time-tested design offers you maximum performance, convenience, and reliability for year after year of sparkling clear pool enjoyment. No wonder more than 2 million Pentair filters have been installed by pool professionals.

• Attractive almond-colored tank blends into any backyard environment.
• High Flow manual air relief valve and continuous internal air relief work together to maintain efficient filtration and prevent over-pressurization.
• Easily accessible 2" drain for efficient cleanout.
• One-year limited warranty.

Download the Owner's Manual (PDF)

Pentair FNS Plus D.E. Filters Buying Guide