Armstrong S-25 BF S-25 BF In-Line Circulator Pump - Bronze Fitted, 1/12 HP (174031-013)

SKU: 23005
Brand: Armstrong Model: S-25 BF Condition: New

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Circulator Pumps

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Armstrong S-25 BF In-Line Circulators are apart of the Series S. The 1/12 HP bronze fitted circulator pump is suitable for hydronic heating and cooling, domestic water systems, multi-stage zoning and general industrial service applications. Built using a standard three-piece design that features a radially-split body, oversized shaft, centrifugal impeller, positive mechanical seal and modular construction; Armstrong Pumps Series S Circulators are a trusted, durable product that have been used by HVAC professionals for decades. Note: Flanges sold separately.

Comparable to B & G Series 100 BF, Grundfos UP26-64F, and Taco #110.


• Standard three-piece design
• Radially-split body: Can be left in-line while servicing pump, eliminating disconnecting of pipes
• Oversized shaft: Made from special alloy steel
• Centrifugal impeller: Ensures maximum water delivery in the HVAC system
• Positive mechanical seal: ARMseal construction ensures many years of noise-free, trouble-free service
• Modular construction: Unique shaft and bearing module fits for ease of serviceability and reduced inventory costs


• Model Number: S-25 BF
• Item Number: 174031-013
• Flange Size (NPT): Less Flanges (Sold Separately)
• Horsepower: 1/12 HP
• Voltage: 115V
• Phase: 1 Phase
• Body Pump: Iron
• Construction: Bronze-Fitted
• Volute: Cast Iron
• Impeller: Non-Ferrous
• Shaft: Alloy Steel-Copper Sleeve
• Mechanical Seal Assembly: Carbon Brass Trim - Ceramic Seat
• Maximum Operating Temperature: 225° F (107° C)
• Maximum Working Pressure: 125 psi (862 kPa)

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