Grundfos 98126828, Model MAGNA3 40-80 F, Flange Mount, Cast Iron Circulator Pump, 1/3 HP, 208-230 Volts, 1-1/2" Flange Size

SKU #: 98126828
Brand: Grundfos
In Stock! (Ships Today !) This item is In Stock at our warehouse distribution center. Stock orders placed Monday through Friday by 1:00 pm EST. will be shipped the same day. Orders placed Friday after 1:00 pm through Sunday will be shipped on Monday.
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 LIST PRICE 1,982.00
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Grundfos MAGNA3 40-80 F Circulator Pump

This MAGNA3 circulator pump is designed for circulating liquids in systems with variable flows where it is desirable to optimize the setting of the pump duty point, thus reducing energy costs. This pump is especially suitable for installation in existing systems where the differential pressure across the pump is too high in periods with reduced flow demand.  It is also suitable for new systems where automatic adjustment of pump head to actual flow demand is desired, without using expensive bypass valves or similar components. Furthermore, the pump is suitable for systems with hot water priority as an external signal can immediately force the pump to operate according to the maximum curve, for example in solar heating systems.  Simply install the pump and leave it on the factory setting, AUTOADAPT.  The pump will automatically analyze the heating system, find the optimum setting and then continuously adjust its operation to changes in demand saving time and effort.

The MAGNA3 is the most efficient circulator available on the market today. With the lowest Energy Efficiency Index (EEI) in the world, below 0.20, you can achieve energy savings of up to 75% compared to a typical installed circulator. With the unique Autoadapt control these savings can be as much as 85% and thereby a remarkably fast return on investment.


  • Intuitive user interface with TFT display
  • Proportional pressure control
  • Constant pressure control
  • Constant temperature control
  • Built-in Grundfos differential pressure and temperature sensor
  • Constant curve duty
  • Maximum or minimum curve duty
  • Automatic night setback
  • Internal motor protection. No external motor protection required
  • Heat energy meter
  • Work log history
  • Insulating shells supplied with single-head pumps for heating systems
  • Large temperature range where the liquid temperature and the ambient temperature are independent of each other
  • 8-1/2"  port-to-port length
  • Maximum flow 81 GPM
  • Maintenance free
  • Multi-pump function
  • External control and monitoring enabled via add-on modules


  • Heating systems
  • Air-conditioning and cooling systems
  • Domestic hot water systems
  • Ground source heat pump systems
  • Solar heating systems
Please see the manuals for specifications on this item

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