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    FNS Plus Inground Pool DE Filter

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    In-Ground Pool DE Filters
    • Diatomaceous earth (DE) filtration system for in-ground pools
    • Pentair FNS Plus filter is combined with high-quality SuperFlo pump to provide a superior, long-lasting filtration system
    • Fiberglass-enforced polypropylene tank provides years of corrosion-free filtration
    • Removable filter grid pack is simple to maintain
    • Combination manual and automatic air pressure relief valve systems
    • Filters are combined with powerful SuperFlo pumps for maximum cleaning capacity
    • Comes with filter tank, 6-way multi-port valve and pressure gauge
    • Pump-to-filter fittings not included
    • 1-year warranty
    more information
      • Qty.
      • Item No.
      • Item Name
      • Only!
      • E3684
      • 1-1/2 inch Multiport Valve SM 10-2
      • 1-1/2 inch Multiport Valve SM 10-2
      • E3684
      • Was $175.99
        $159.99
      • Type: D.E.
        Style: Side Mount 6-position Multiport
        Model #: 261177
      • E3725
      • 48 sq. ft. DE Filter System (with 1-HP pump)
      • 48 sq. ft. DE Filter System (with 1-HP pump)
      • E3725
      • Was $1,549.99
        $1,394.99
      • E3690
      • 48 sq. ft. DE Filter Only with valve
      • 48 sq. ft. DE Filter Only with valve
      • E3690
      • Was $1,059.99
        $953.99
      • E3683
      • 48 sq. ft. DE Filter Only (no valve)
      • 48 sq. ft. DE Filter Only (no valve)
      • E3683
      • Was $1,019.99
        $917.99
      In-Ground Pool DE Filters
      • Diatomaceous earth (DE) filtration system for in-ground pools
      • Pentair FNS Plus filter is combined with high-quality SuperFlo pump to provide a superior, long-lasting filtration system
      • Fiberglass-enforced polypropylene tank provides years of corrosion-free filtration
      • Removable filter grid pack is simple to maintain
      • Combination manual and automatic air pressure relief valve systems
      • Filters are combined with powerful SuperFlo pumps for maximum cleaning capacity
      • Comes with filter tank, 6-way multi-port valve and pressure gauge
      • Pump-to-filter fittings not included
      • 1-year warranty
      more information
      • More Information
      • Customer Reviews
      • MORE INFO

      This powerful filter uses diatomaceous earth to filter out particles so tiny they’re barely visible to the human eye, but when combined can create cloudy swimming pool water. The FNS Plus from Pentair is made with a long-lasting fiberglass-reinforced polypropylene tank with curved vertical grids that create a large filtration surface area, maximizing the filter’s cleaning capability and extending the period of time between cleanings. The FNS Plus comes with a removable filter grid pack that makes maintenance a snap, and has a combination manual air relief valve plus continuous air relief valve to prevent over-pressurization.

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