(Open Box) Hayward 400,000 BTU Universal H-Series Natural Gas Low NOx Heater

Save $570

$3,979 $4,549

Product Description

The Universal H-Series is an energy efficient, high performance, installation adaptable commitment to the pool service professional.

Hayward Item Code: W3H400FDN


  • 83% Efficiency.
  • Standard Cupro Nickel Heat Exchanger - Excellent salt water and chemical corrosion resistance.
  • Exclusive 'Totally Managed' - Same water velocity through all tubes for faster heating.
  • Patented Header By-Pass Design - Up to 18 percent saving by reducing pump run-time.
  • 2" x 2.5" CPVC Union Connections - Adapts to larger plumbing recommended for greater efficiencies.
  • Low NOx Emissions - Meets clean air quality standards.
  • Updated PCB Display - New enclosure protected from the elements and weather.
  • Polymer Tube Bends - Eliminating tinned tubes.
  • Easily connect to all brands of automation.
  • Additional Discounts / Rebates may apply, please contact us for details.

Did You Know?

  • Quick plumbing kit available when replacing Pentair and Jandy heaters.
    • UHXWJAK1930 used when replacing Jandy JXi.
    • UHXWPAK1930 used when replacing Pentair MasterTemp.
  • When a chlorinator is installed down stream of any heater ensure you are using a check valve to prevent high concentrate chlorine back flowing into heater causing premature failure (PSCV2SDGR or PSCV2S2DGR).
  • Solar Covers keep pools warm by preventing warmer water from evaporating away, saving money on chemical costs as well as reducing heating costs by 70% or more. Save your heat and save your money.

    Venting Specification

    • Hayward H400FDN & H400FDP Vertical Adapter / Negative Pressure:
      • Hayward Item Code: UHXNEGVT14008 (Adapter Only)
    • Hayward H400FDN & H400FDP Horizontal Adapter / Positive Pressure:
      • Hayward Item Code: UHXPOSHZ14008 (Adapter Only)
      • Pool Products Canada Code: PPCPOSHZKIT14008
        • Includes adapter, elbow, length, and termination cap.

    Hayward UHS Brochure

    Hayward UHS Manual

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      Manuals & Attachments

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