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Grundfos Alpha2 15-55F/LC Variable Speed Circulator Pump with cord -99163906

USD$ 217
SKU: N-350
6 In Stock


Includes Insulation kit, 120 VAC NEMA Power Chord and Check Valve

Circulating Pump-Grundfos ALPHA2 15-55 is the standard by which all other variable speed circulating pumps are measured. The ALPHA2 15-55 has a cast iron body with a permanent magnetic motor that allows it reduce energy consumption by over 50% compared to standard circulation pumps. The LC model includes a standard 115 VAC Nema power chord. This product comes with a custom insulated jacket ideal for both heating and cooling. Check valve is also included.

AUTOADAPT measures the system changes and automatically adapts to maximize the energy or to maintain a certain flow rate. Great for multiple zones that open and close at different times as the AUTOADAPT will sense the pressure drop increases the pump speed to compensate for added zones.

Grundfos ALPHA2 15-55F/LC Features:

  • Large display shows current energy consumption in Watts
  • Large display shows estimated flow in gallons per minute
  • Integrated check-valve (removable)
  • Line chord 110 -120 VAC
  • Cast Iron pump housing
  • Insulated pump jacket
  • A one button, easy-to-use interface
    1. 3 Fixed Speeds
    2. 3 Constant Pressure Speeds
    3. AutoAdapt Range


  • Closed loop radiant heating & snow melting systems, solar thermal secondary loops
  • Baseboard/Radiator/Fan coil heating and other hydronic heating applications
  • Air Source Heat pumps (hydronic)
  • Geothermal de-super heaters
  • Multiple Zones

Technical Specifications of Grundfos ALPHA2 15-55F/LC :

  • Flow Range: 0 to 21 GPM
  • Head Range: 0 to 19 Feet
  • Motor: 1x115V
  • Min. Fluid Temperature: 36F
  • Max. Fluid Temperature: 230F
  • Max. Working Pressure: 150 PSI
  • Watts: 5-45W
  • Amps: 0.65A
  • 1/16 HP


3 years manufacturer's warranty.

Pump Curve

Heating Load & Heat Loss Design Services

Heating Load & Heat Loss Design Services

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