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  • Caleffi Solar Pump Station with Return and Flow - 279051A

    - 3 Speeds - Dual-line - Old number was 255050A - changed in late 2015

    Product ID • 255050A00000

  • This Product is no longer available through It has either been discontinued, made obsolete, or is no longer available for sale. Please select another product. Please click here to see Replacement Product.


The Caleffi Solar Pump Station model 279501A is a pre-installed and leak-tested unit with fittings for transferring heat from the collector to the storage tank. It contains important fittings and safety devices for the operation of the solar thermal system.

Caleffi Solar pump station 279501A does not include top or bottom fittings and must be purchased seperately.



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Manuals & Docs

Technical Specs

Caleffi Solar pump station 279501A Technical Specs

  • Balance/flow meter
    1/2 to 5 gpm scale
  • Pump
    Grundfos UP15-100
  • Performance
    36 feet head / 8 gpm
  • Safety relief valve
    90 psi
  • Max working pressure
    150 psi
  • Max working temp
  • Caleffi Solar Pump Station Connections
    3/4 Inches female thread
  • Agency approval

Caleffi Solar pump station 279501A Features

  • Safety relief valve
  • Ball valves with built-in flow checks in return and flow to prevent gravity and thermo circulation
  • Temperature gauges in return and flow
  • Expansion tank connection
  • Connections for flushing and filling
  • Unit for flushing, filling and emptying the system
  • Air vent for manual bleeding of the solar thermal system
  • Flow meter for displaying and setting the flow rate
  • Thermometer in flow and return for displaying both temperatures
  • Pressure gauge for displaying the system pressure
  • Safety relief valve to prevent overpressure
  • Three-speed solar pump for wide range of flow rates
  • Foam insulation

Info & Links

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Hot Water Output examples for 3 locations

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