Lochinvar & A.O. Smith 100327345 Impeller

The Lochinvar & A.O. Smith 100327345 Impeller is a precision-engineered OEM water heater replacement part designed to maintain critical flow rates in high-efficiency hydronic and domestic hot water systems. As the direct Lochinvar 100327345 impeller supersession for the retired 100133575 part number, this component ensures the pump assembly meets exact head pressure and GPM requirements. For contractors servicing Lochinvar boiler replacement units or A.O. Smith water heater systems, installing this water circulation impeller is vital for preventing cavitation and ensuring heat exchanger longevity. This efficient water heater component is built to withstand the thermal cycling typical of commercial and residential demand, providing a drop-in OEM heating system impeller solution that eliminates the bypass risks associated with third-party alternatives. Rely on this Lochinvar pump replacement part to restore factory-spec circulation and system equilibrium.

Key Benefits for Technicians:

• Direct OEM Supersession: Replaces legacy part number 100133575 with updated engineering for better water circulation.
• System Matching: Specifically calibrated for Lochinvar and A.O. Smith pump housings to maintain optimal flow velocity.
• Structural Integrity: High-grade materials resist erosion and mineral buildup, common failure points in hydronic heating systems.
• Performance Restoration: Corrects low-flow errors and temperature fluctuations in residential and commercial water heaters.

Common Technical Questions:

Is the 100327345 compatible with older 100133575 pump housings?
Yes, this is the current manufacturer-specified replacement for the 100133575, designed to fit the existing volute without modification.

What symptoms indicate a failing water heater impeller?
Technicians should look for increased pump noise, "no-flow" error codes on the controller, or a significant delta-T increase across the heat exchanger.

Does this part include the shaft seal?
This SKU typically covers the impeller itself; we recommend inspecting the mechanical seal and O-rings for wear during any Lochinvar 100327345 installation.

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.