Armstrong 106285MF-132, Model S-57-1, Cast Iron In-Line Pump With 3" NPT Flanges, Series S, 3/4 HP, 115/230 Volts, 1 Phase, 139 GPM Max, Maintenance Free Design

SKU #: 106285MF-132
Brand: Armstrong
Available For Order! (Usually Ships 3-5 Days)This product is direct shipped from the manufacturer to our distribution center where it is checked, packaged and processed by our quality control team. The shipping time shown is the estimated number of business days the product will ship out from our wa
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Armstrong Series S Maintenance Free Circulator Pump

This Armstrong In-Line circulator is suitable for hydronic heating and cooling, multi-stage zoning and general industrial service applications. It is built using a standard three-piece design that features a radially-split body, oversized shaft, centrifugal impeller, positive mechanical seal and modular construction. This circulator has been used by HVAC professionals for decades because it is cost-effective, durable and easy to maintain.


  • Maintenance free design which has permanently lubricated ball bearings and requires no maintenance at all
  • Radially-split body can be left in-line while servicing pump, eliminating disconnecting of pipes
  • Oversized shaft made from stainless steel
  • Balanced centrifugal impeller ensures maximum water delivery in the HVAC system
  • Proven seal design made from strong and long-lasting materials for extended operating life
  • Three piece modular construction and back pull-out design for easy replacement of wear components


Mfg. Number106285MF-132
Product TypeIn line Circulator
ApplicationHVAC/General purpose
Horsepower3/4 HP
Voltage115/230 Volts
Frequency60 Hz
Speed1800 RPM
DesignThree piece
Motor TypeODP
Flanges3" NPT
Maximum Flow139 GPM
Maximum Head29 ft
Pump BodyCast iron
Volute MaterialCast iron
Impeller MaterialNon-ferrous
Thermal Overload ProtectionYes
Maximum Fluid Temperature107°F
Maximum Operating Conditions148 psi at 225°F

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