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Tested and Certified by NSF International against
NSF/ANSI Standards 42, 53, and 401 for the reduction
of the claims specified on the Performance Data
Sheet and at www.NSF.org.
The recommended replacement frequency for the AO-FF is
every 200 gallons of use or every 6 months.
Use only certified, genuine A. O. Smith replacement filters for
continued contaminant removal and system performance.
Tested and Certified by NSF International against
NSF/ANSI Standards 42, 53, and 401 for the reduction
of the claims specified on the Performance Data
Sheet and at www.NSF.org.
The recommended replacement frequency for the AO-CWM is
every 320 gallons of use or every 6 months.
Use only certified, genuine A. O. Smith replacement filters for
continued contaminant removal and system performance.
A. O. Smith Corporation P.O. Box 1597 | Johnson City, TN 37605-1597 | 877.333.7108
Need help?
We'll be happy to assist you in any way at
877.333.7108
Please do not return to the store.
For the full list of
contaminants filtered,
scan to view the AO-FF
Performance Data
Sheet on
AOSmith.com.
For the full list of
contaminants filtered,
scan to view the
AO-CWM Performance
Data Sheet on
AOSmith.com.
AO-US-100-R_install_Aug2022