Armstrong Fluid Technology 174031MF-043 Pump

The Armstrong Fluid Technology 174031MF-043, also known as the Model S25AB, is a high-performance 1/12 HP circulator pump engineered for precision in hydronic heating and cooling systems. Designed for domestic hot water systems and general industrial use, this lead-free all bronze body pump ensures long-term resistance to corrosion in open-loop applications. It operates on 115Vac power and is a single phase unit featuring a non-ferrous impeller for maximum water delivery. The signature three-piece S Series design includes a radially-split body, allowing technicians to service the pump in-line without disconnecting piping. Equipped with permanently lubricated maintenance free bearings and built-in thermal overload protection, the 174031MF-043 provides quiet, reliable operation. This 115V bronze circulator is a compatible replacement for common industry models like the B&G Series 100AB and Taco 110, fitting 3/4", 1", 1 1/4", or 1 1/2" flanges.

Key Benefits

• Lead-Free Bronze Construction: Safe for potable water systems and highly resistant to rust and corrosion.
• Maintenance-Free Operation: Features permanently lubricated ball bearings that eliminate the need for regular oiling.
• Thermal Protection: Includes built-in thermal overload protection to prevent motor damage and ensure safe performance.
• Serviceable Design: The 3-piece modular construction and back pull-out design allow for quick part replacement and minimal downtime.
• Versatile Compatibility: Standard flange configurations make this Armstrong S25AB pump easy to swap into existing HVAC and plumbing systems.

Common Questions

Can the 174031MF-043 be used for drinking water?
Yes, the lead-free all bronze body and non-ferrous impeller make this potable water pump ideal for domestic hot water circulation and drinking water applications.

Is this pump a direct replacement for Bell & Gossett or Taco models?
Yes, the Armstrong 174031MF-043 is designed as a high-efficiency alternative to the Bell & Gossett Series 100AB and Taco 110 series in-line circulators.

Does this unit require regular lubrication?
No, this specific model features a maintenance-free design with bearings that are sealed and lubricated for life, eliminating oil pools and routine maintenance tasks.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.

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