Grundfos ALPHA 15-55F, Check Valve, 115V Cast Iron Circulator Pump [59896877]

Part #: GRA15-55F
In stock

Availability: In stock

For Residential and Light Commercial Heating Systems

A typical pump in a heating system runs at full speed day and night. The ALPHA from Grundfos adapts to the variable demand of the house while keeping your comfort. In that way it saves a considerable amount of electricity and thereby reduces an equally large amount of emissions.

Rated A for its energy efficiency, the ALPHA is a highly reliable and environmentally responsible choice. When installed and set in the unique Grundfos AUTOADAPT function ALPHA will analyze and adjust automatically to your heating demands. This pump is comparable in size to Taco 007 and Bell & Gossett NRF-22 pumps.

ALPHA is the latest and most innovative member of the Grundfos family of high-quality circulators. With ALPHA, you can stop worrying about complicated pump settings. Simply install the pump and leave it in the factory setting, AUTOADAPT. ALPHA will automatically analyze the heating system, find the optimum setting and continue to adjust its operation to changes in demand.


GRUNDFOS ALPHA is designed for circulating liquids in heating systems. Pumps with stainless steel pump housing can also be used in domestic hot-water systems.

  • Systems with constant or variable flows where it is desirable to optimize the pump duty point
  • Systems with variable flow-pipe temperature
  • Systems where night setback is an issue and desired
Features and benefits
  • Compact design with control box well integrated in the pump head
  • AUTOADAPT control mode as default setting, suitable for most applications
  • Integrated differential-pressure control (proportional- and constant pressure control)
  • A display showing the actual power consumption (P1) in Watt
  • Low noise
  • High starting torque
  • Automatic Night SetBack
  • Motor based on permanent-magnet/compact-stator technology
  • Integrated frequency converter
  • Self-venting pump housing

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