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The Pentair FNS Plus 48 sq. ft. D.E. Pool Filter is designed with a fiberglass-reinforced polypropylene tank that enhances durability.

  • Valve sold seperately
  • Chemical-resistant fiberglass-reinforced polypropylene tank for exceptional strength and long life.
  • Attractive almond-colored tank blends into any backyard environment.
  • Easily removable filter grid pack is secured by a single nut to simplify maintenance.
  • Hi Flow manual air relief valve and continuous internal air relief eliminate air buildup from tank to maintain efficient filtration and prevent over-pressurization.
  • Conveniently located 1-1/2" drain for easy and efficient cleanup.
  • Unique internal design ensures optimal filtration and backwashing efficiency for longer runs between cleanings.
  • Compatible with all sanitizing chemicals.
  • Curved vertical grids provide maximum filter surface area for better cleaning.
  • Leakproof plumbing connections.
  • Tension Control clamp for secure tank closure
  • Certified to NSF/ANSI 50

Pentair - EC-180008 FNS Plus 48 sq. ft. DE Pool Filter

SKU: EC-180008
$1,449.00 Regular Price
$1,249.00Sale Price
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    The Pentair FNS Plus 48 sq. ft. Fiberglass D.E. Pool Filter provides the highest level of filtration. The FNS Plus is capable of filtering out particulate as small as 5 microns. That's the same size as a human red blood cell.

    The FNS plus uses a set or grids coated in pool grade diatomaceous earth. The set of grids consists of 7 full grids 24" in length and 1 partial grid 24" in length. The FNS Plus tank is made with fiberglass-reinforced polypropylene that enhances durability and product life. It uses a hi-flow manual air relief valve that eliminates air buildup in the tank rather than having it force back thru the system.

    A 1-1/2" drain is used for quick drainage, and a steel tension control clamp rests securely around the tank, a brass barrel nut securely fastens each half tightly together. To remove the FNS Plus requires a minimum of 74" vertical clearance. Before removing the dome lid, it is suggested to backwash the filter to discharge the contaminated DE powder.

    Common Questions:

    What are the dimensions of the tank?

    • Tank Dimensions: (DxH) 21.5" x 49"
    • Weight: 84 lbs

    How much DE do I add?

    • The FNS Plus uses 4.8 lbs of DE.

    What is the max GPM flow rate?

    • The max GPM flow rate is 120 GPM.

    What does FNS Plus come with?

    • The FNS Plus comes with the tank, steel clamp, air relief valve, and threaded bulk heads.

    Does the FNS Plus come with a backwash valve?

    • No. The FNS Plus does not come with a backwash valve. For a multi-port valve option, we suggest item number 261152 for 2" plumbing and 261177 for 1.5" installations. For a side-mount push-pull valve, we suggest item number 263064.

    What is the warranty for the FNS Plus?

    • One year parts only warranty from the date of purchase. Please see the Pentair Warranty Card for more details.
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