Lochinvar & A.O. Smith 100133603 Pump

The Lochinvar & A.O. Smith 100133603 Pump is a high-performance, bronze-fitted circulating pump designed for demanding commercial hydronic and potable water applications. Engineered as a direct replacement for the Armstrong ARM3024PBF, this 1/2 HP unit operates at a synchronous speed of 1800 RPM. It features a versatile 115/230V dual-voltage motor, allowing for seamless integration into various electrical configurations without requiring additional transformers. This centrifugal pump is specifically utilized in Lochinvar Copper-Fin boilers and A.O. Smith water heaters, providing reliable fluid circulation to maintain optimal thermal exchange. The 2-1/2 inch flanged connection ensures a secure, leak-proof fit in high-flow systems, while the bronze-fitted construction offers superior corrosion resistance in open-loop or fresh water environments. Technicians value this assembly for its maintenance-free bearing design and standard three-piece modularity, which simplifies field service by allowing the motor and bearing bracket to be removed without disturbing the system piping.

• Direct OEM Compatibility: Identical to Armstrong ARM3024PBF, ensuring a drop-in replacement for Lochinvar and A.O. Smith commercial units.
• Dual-Voltage Versatility: Field-selectable 115/230V motor configuration accommodates standard HVAC electrical requirements.
• Corrosion-Resistant Performance: Bronze-fitted design prevents scaling and oxidation, extending service life in potable water applications.
• High-Flow Efficiency: 1/2 HP motor provides the necessary head pressure for hydronic heating and domestic hot water recirculation.
• Service-Friendly Design: Radially-split body allows for internal component maintenance while the pump remains in-line.

Is the 100133603 compatible with all Lochinvar Copper-Fin models?
This pump is specifically specified for larger Copper-Fin and Power-Fin series models requiring a 2-1/2" flange size. Always verify the flange dimensions and flow requirements of your specific boiler before installation.

Can this pump be used in a domestic potable water system?
Yes, the bronze-fitted construction makes it suitable for fresh water and domestic hot water systems where cast iron pumps would typically fail due to oxygen-rich water corrosion.

Does this unit require manual lubrication?
This circulating pump features a modern, permanently lubricated bearing design, eliminating the need for periodic oiling and reducing long-term maintenance overhead.

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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.