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Armstrong 116432MF-133, Model H-51, Bronze In-Line Pump With 1

Armstrong 116432MF-133, Model H-51, Bronze In-Line Pump With 1" NPT Flanges, Series H, 1/4 HP, 115 Volts, 1 Phase, 42 GPM Max, 24 ft Max Head, Lead Free, Maintenance Free Design

SKU #: 116432MF-133
Brand: Armstrong

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Ship Weight (48.00 lbs)


Armstrong Series H Circulator Pump

This Armstrong In-Line circulator is suitable for domestic hot water systems. 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 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
  • Certified ≤ 0.25 weighted average percent lead and complies with California Health and Safety Code Section 116875 (commonly known as ab1953)

Mfg. Number116432LF-133
Product TypeIn-line circulator
ApplicationDomestic water systems
Horsepower1/4 HP
Voltage115 Volts
Frequency60 Hz
Speed1800 RPM
Motor TypeODP
DesignThree piece
Flanges1" NPT
Maximum Flow42 GPM
Maximum Head24 ft
Impeller MaterialNon-ferrous
Pump BodyLead free bronze
Volute MaterialLead free bronze
Thermal Overload ProtectionYes
Maximum Fluid Temperature107°F
Maximum Operating Conditions175 psi at 225°F

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