Lochinvar & A.O. Smith 100133610 Pump

The Lochinvar & A.O. Smith 100133610 Pump is a high-performance circulator pump designed for demanding commercial water heating and hydronic applications. This 1/4 HP, 115V bronze-fitted pump is the engineered direct replacement for the obsolete 174036-143LF, TP44PAB, and ARM3044PAB models. Built with a 2-inch flange connection, it is a critical component for hot water recirculation in Lochinvar Copper-Fin and Armor series units, ensuring consistent flow rates and thermal efficiency. The bronze construction prevents corrosion in domestic potable water systems, making it a reliable solution for commercial HVAC repair and boiler maintenance. Pro-grade performance is maintained through a robust motor and seal assembly designed to withstand high-duty cycles. Whether you are performing a pump replacement or a system upgrade, this authentic OEM part ensures perfect drop-in compatibility and restores original equipment specifications to the heating loop.

• Direct OEM Replacement: Seamlessly replaces 174036-143LF, eliminating the need for extensive repiping or bracket modifications.
• Corrosion Resistance: Features a bronze-fitted volute, making it suitable for both open and closed-loop potable water systems.
• Optimized Flow Performance: The 1/4 HP motor is precision-tuned for hydronic heating applications requiring 2-inch flanged connections.
• Rugged Durability: Engineered for commercial HVAC environments to reduce downtime and maintain system pressure.

Does this pump include the required gaskets and 2-inch flanges?
This part is the pump assembly. While it features the 2-inch flange connection points, it is recommended to inspect your existing flange bolts and replace the volute gaskets during installation for a leak-free seal.

Is the 100133610 compatible with older Lochinvar Copper-Fin models?
Yes, it is the primary circulator pump for several CW and EW series units. Always verify your specific model's input BTU and head requirements against the 100133610 specifications.

Can this pump be used in a salt-water application?
No. Although it is bronze-fitted for domestic water, it is not rated for high-salinity or saltwater environments which require specialized alloys.

This item must be shipped via trucking. Please contact us for a freight quote.

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.