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The AO SMITH 100271887 is a Fasco pump assembly kit rated at 7.9 GPM, designed for use in water heating systems where circulator or pump assemblies require replacement. This kit provides the core pump components needed to restore proper flow and system operation. Licensed plumbers and HVAC technicians are the typical installers. The 7.9 GPM flow rating is a key performance specification to verify against system requirements before ordering. Note that when ordering this part, you must specify your unit model number, serial number, and whether the unit is currently down.
This pump assembly kit is used in residential or light commercial water heating applications where an AO SMITH water heater or related system requires pump service. It is intended as a direct replacement for a failed or degraded pump assembly within the system. Always confirm the model number and serial number of the host unit prior to procurement to ensure proper fitment.
Designed as an OEM-style replacement pump assembly kit for AO SMITH water heating systems. Confirm model number and serial number of the host unit before ordering to ensure correct fitment.
Installation should be performed by a licensed plumber or qualified HVAC technician familiar with water heating system service. Shut off the water supply and disconnect electrical power to the unit before beginning any work. Follow all applicable local plumbing codes and manufacturer service documentation during installation. Have the unit model number and serial number available before ordering and before beginning service.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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