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For use with municipally treated water only.
Do not use with water that is microbiologically unsafe or of unknown water
quality without adequate disinfection before or after the system.
This system has been tested according to NSF/ANSI Standard 42 for the reduction of the substances listed above.
The concentration of the indicated substances in water entering the system was reduced to a concentration less
than or equal to the permissible limit for water leaving the system as specified in NSF/ANSI 42.
® NSF is a registered trademark of NSF International.
®Teflon is a registered trademark of Chemours Co.
CARE AND MAINTENANCE
Performance Data Sheet for the A. O. Smith Whole House Water Filter
Models
Replacement
Max operating
pressure
Operating temp.
range
Rated Flow
AO-WH-PREV
AO-WH-PREV-R2
100 psi (689.5 kPa)
40-100° F
4.44-32° C
6.0 gpm
A. O. Smith Corporation
11270 West park Place | Milwaukee, WI 53224 | 877.333.7108
Manufactured by Kemflo International Co. Ltd Made in China
Testing was performed under standard laboratory conditions: actual performance may vary. Filter usage must comply with all state
and local laws. Filter is only to be used with cold water. See owner’s manual for general installation conditions and needs as well
as manufacturer’s limited warranty. Do not use with water that is microbiologically unsafe or of unknown water quality without
adequate disinfection before or after the system.
NSF/ANSI 42
Influent
Challenge
Chlorine mg/L
Average %
reduction
NSF reduction
requirements
Max. effluent
Min. reduction
Average
influent
Class V particles
30 to 50 um
at least 1,000
particles/mg/L
98.8%
≥
85%
29 mg/L
>97.6%
1167 /mg/L
System Tested and Certified by NSF International against NSF/ANSI
Standard 42 for the reduction of Particulate Class V.
INSTALLATION GUIDE
PERFORMANCE DATA SHEET
A. O. Smith Corporation
P.O. Box 1597 | Johnson City, TN 37605-1597 | 877.333.7108
6
Summary of Contents for AO-WH-PREV
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