A. O. Smith compatibility lookup

AO-US-200 Compatible Replacement Parts

A. O. Smith AO-US-200 Under Sink Water Filter

Confirmed fits

Part number: AO-US-200-R

AO-US-200 replacement filters should be matched to the AO-US-200 system rather than other A. O. Smith cartridge families.

Before choosing replacement filters

Match the device label to AO-US-200; series names alone can point to another part.
Compare the old part number against each confirmed fit before ordering.
Use the fit note when depth, cartridge stage, bag type, or kit contents are unclear.

Countertop water filter tank

Water filter jug

Whole-house water filter housing

Under-sink reverse osmosis water purifier