Pentair FNS Plus Filter

Pentair FNS Plus Filter
Item # Item Description Price Qty
57521155 FNS Plus 36 DE Filter w/o Valve
57521205 FNS Plus 48 DE Filter w/o Valve

FNS® Plus Fiberglass DE Filter

by Pentair Aquatic Systems®

The culmination of 40 years of pool filter experience

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

  • Corrosion-resistant fiberglass tank for long life

  • Tension Control™ clamp for secure closure

  • 2" plumbing connections for maximum flow

  • Conveniently-located 1 1/2" drain for easy and efficient cleanout and 100% draining

  • 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 filtraiton and prevent over-pressurization

  • One-year limited warranty

FNS Plus DE pool 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 flow restrictions, and therefore requires minimal pumping power to achieve a needed flow 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 optimim filtration and backwashing efficiency. 

  • Chemical-resistant, fiberglass-reinforced polypropylene tank offers exceptional strength and long life. 

  • Easily removable filter grid pack simplifies maintenance and saves you time. 


For Manufacturer’s Warranty, Click Here