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Armstrong 116531-132, Model S-69-1, Cast Iron In-Line Pump With 3

Armstrong 116531-132, Model S-69-1, Cast Iron In-Line Pump With 3" NPT Flanges, Series S, 1 HP, 115/230 Volts, 1 Phase, 160 GPM Max, 34 ft Max Head, Sleeve Bearing Design

SKU #: 116531-132
Brand: Armstrong

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Ship Weight (130.00 lbs)


Armstrong Series S 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.


  • Standard three-piece design with sleeve - oil lubricated bearing
  • Radially-split body can be left in-line while servicing pump, eliminating disconnecting of pipes
  • Oversized shaft made from special alloy 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. Number116531-132
Product TypeIn-line circulator
ApplicationHVAC / General purpose
Horsepower1 HP
Voltage115/230 Volts
Frequency60 Hz
Speed1800 RPM
Motor TypeODP
DesignThree piece
Flanges3" NPT
Maximum Flow160 GPM
Maximum Head34 ft
Impeller MaterialBrass-stamped
Pump BodyCast iron
Volute MaterialCast iron
Thermal Overload ProtectionYes
Maximum Fluid Temperature107°F
Maximum Operating Conditions125 psi at 225°F

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