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833.232.9711
To clean your filter unit, wipe down
the exterior with a damp cloth.
Once filters are at 95% capacity (about
every 6 months), the battery alarm will
sound and flash red when water is
flowing and will continue for 15 seconds
once water is turned off. Change the
battery every time you replace your filters.
The battery is included with the filter
replacement cartridges.
Safeguards
• Use only cold water with filter.
• If you experience a hose connection
leak, disconnect and re-seat the hose.
Do not use with water that is microbiologically
unsafe or of unknown water quality without
adequate disinfection before or after the
system. Systems certified for cyst reduction
may be used on disinfected waters that may
contain filterable cysts.
CARE AND MAINTENANCE
4
AOW-2000
Replacement cartridge AOW-2000-R
Rated service flow .5gpm (1.89 lpm)
Max capacity 500 gal (1892 liters)
Min working pressure 20 psi (137 kPa)
Max working pressure 80 psi (551 kPa)
Min operating temperature 40° F (4.44° C)
Max operating temperature 90° F (32.22° C)
CARE AND MAINTENANCE
5
Performance Data Sheet for the A. O. Smith Under Counter Water Filter
Models
Replacement
Operating pressure range Rated capacity
Operating temp. range Rated flow
AOW-2000 AOW-2000-R
20-80 psi
137-551 kPa
500 gallons
1892 Liters
40-90° F
4.44-32.2° C
.05 gpm
1.89 lpm
Manufactured by: A. O. Smith Corporation
11270 West Park Place | Milwaukee, WI 53224 | 833.232.9711
Organic chemicals included by surrogate testing
VOCs
(by surrogate testing
using chloroform)
Drinking
water
regulatory
level (MCL/
MAC) mg/L
Influent/
Unfiltered
Effluent/
Filtered
Percent
Reduction
alachlor
0.002
0.050
0.001
>98%
atrazine
0.003
0.100
0.003
>97%
benzene
0.005
0.081
0.001
>99%
carbofuran
0.04
0.190
0.001
>99%
carbon tetrachloride
0.005
0.078
0.0018
98%
chlorobenzene
0.1
0.077
0.001
>99%
chloropicrin
—
0.015
0.0002
99%
2,4-D
0.07
0.110
0.0017
98%
dibromochloropropane (DBCP) 0.0002
0.052
0.00002
>99%
o-dichlorobenzene
0.6
0.080
0.001
>99%
p-dichlorobenzene
0.075
0.040
0.001
>98%
1,2-dichloroethane
0.005
0.088
0.0048
95%
1,1-dichloroethylene
0.007
0.083
0.001
>99%
cis-1,2-dichloroethylene
0.07
0.170
0.0005
>99%
trans-1,2-dichloroethylene
0.1
0.086
0.001
>99%
1,2-dichloropropane
0.005
0.080
0.001
>99%
cis-1,3-dichloropropylene
—
0.079
0.001
>99%
dinoseb
0.007
0.170
0.0002
99%
endrin
0.002
0.053
0.00059
99%
ethylbenzene
0.7
0.088
0.001
>99%
ethylene dibromide (EDB)
0.00005
0.044
0.00002
>99%
haloacetonitriles (HAN)
bromochloroacetontrile
—
0.022
0.0005
98%
dibromoacetontrile
—
0.024
0.0006
98%
dichloroacetontrile
—
0.0096
0.0002
98%
trichloroacetontrile
—
0.015
0.0003
98%
haloketones (HK)
1,1-dichloro-2-propanone
—
0.0072
0.0001
99%
1,1,1-trichloro-2-propanone
—
0.0082
0.0003
96%
heptachlor (H-34, Heptox)
0.0004
0.025
0.00001
>99%
heptachlor epoxide
0.0002
0.0107
0.0002
98%
hexachlorobutadiene
—
0.044
0.001
>98%
hexachlorocyclopentadiene
0.05
0.060
0.000002 >99%
lindane
0.0002
0.055
0.00001
>99%
methoxychlor
0.04
0.050
0.0001
>99%
pentachlorophenol
0.001
0.096
0.001
>99%
simazine
0.004
0.120
0.004
>97%
styrene
0.1
0.150
0.0005
>99%
1,1,2,2-tetrachloroethane
—
0.081
0.001
>99%
tetrachloroethylene
0.005
0.081
0.001
>99%
toluene
1
0.078
0.001
>99%
2,4,5-TP (silvex)
0.05
0.270
0.0016
99%
tribromoacetic acid
—
0.042
0.001
>98%
1,2,4-trichlorobenzene
0.07
0.160
0.0005
>99%
1,1,1-trichloroethane
0.2
0.084
0.0046
95%
1,1,2-trichloroethane
0.005
0.150
0.0005
>99%
trichloroethylene
0.005
0.180
0.0010
>99%
trihalomethanes (THMs)
Influent/
Unfiltered
Effluent/
Filtered
Percent
Reduction
bromodichloromethane (THM)
0.080
0.300
0.015
95%
bromoform (THM)
chloroform (THM)
chlorodibromomethane (THM)
xylenes (total)
10
0.070
0.001
>99%
NSF/ANSI 42
Min Reduction
Overall % Reduction Results
Chlorine Reduction, Free Available
<0.5 mg/l
97.66%
Pass
Chloramine Reduction, Free Available <0.5 mg/l
97.66%
Pass
Particulate Reduction
85%
99.9%
Pass
NSF/ANSI 53
Min Reduction
Overall % Reduction Results
Cyst Live Cryptosporidium & Giardia 99.95%
>99.99%
Pass
Mercury Reduction pH 8.5
<2 ug/L
>95%
Pass
Mercury Reduction pH 6.5
<2 ug/L
>96.5%
Pass
Lead Reduction pH 6.5
<10 ug/L
>99.4%
Pass
Lead Reduction pH 8.5
<10 ug/L
>99.3%
Pass
MTBE Reduction
<5 ug/L
86.6%
Pass
Turbidity
<0.5 NTU
99.1%
Pass
VOC Surrogate Test
95%
99.4%
Pass
Asbestos
99%
>99%
Pass
NSF/ANSI 401 Maximum
Concentration
Minimum Reduction Overall % Reduction Results
Atenolol
30 ng/L
94.2%
94.2%
Pass
Bisphenol A
300 ng/L
98.80%
98.9%
Pass
Carbamazepine 200 ng/L
98.6%
98.6%
Pass
DEET
200 ng/L
98.7%
98.7%
Pass
Estrone
20 ng/L
96.30%
96.5%
Pass
Ibuprofen
60 ng/L
95.3%
95.4%
Pass
Linuron
20 ng/L
96.6%
96.6%
Pass
Meprobamate
60 ng/L
94.7%
94.7%
Pass
Metolachlor
200 ng/L
98.6%
98.6%
Pass
Naproxen
20 ng/L
96.3%
96.4%
Pass
Nonyl phenol
200 ng/L
97.50%
97.5%
Pass
Phenytoin
30 ng/L
95.50%
95.6%
Pass
TCEP
700 ng/L
98%
98%
Pass
TCPP
700 ng/L
97.8%
97.8%
Pass
Trimethoprim
20 ng/L
96.7%
96.7%
Pass
NSF P473
Influent challenge
concentration
Maximum
permissible
concentration
Overall % reduction Results
Perfluorooctanoic
acid (PFOA) &
Perfluorooctane
sulfonate (PFOS)
1.5 ±10% ug/L
0.07 ug/L
96 %
Pass
System Tested and Certified by NSF International against NSF/
ANSI Standard 42, 53 & 401 and conforms to NSF protocol
P473 for reduction of claims specified on the Performance
Data Sheet and at www.nsf.org.
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.
Filter is only to be used
with cold water.
Filter usage must comply
with all state and local laws.
Testing was performed
under standard laboratory
conditions, actual
performance may vary.
Systems certified for cyst
reduction may be used on
disinfected waters that may
contain filterable cysts.
See owner’s manual for general
installation conditions and
needs plus manufacturer’s
limited warranty.
• All contaminants reduced by this filter are listed.
• Not all contaminants listed may be present in your water.
• Does not remove all contaminants that may be present in tap water.
Testing Performed under NSF/ANSI Standards 42 and 53 and in accordance with the California Department of Health Services Drinking Water Treatment
Device Program. This system has been tested according to NSF/ANSI 42, 53, 401 & P473 for reduction of the substances listed below. 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, 53, 401 & P473.
Remove
each sump
from the
manifold
by hand.
Place wrench
over sump
top and
slide down.
Continue turning
counterclockwise.
Remove top
and filter.
WARNING
Do not use tools
to remove or tighten sumps.
Over-tightening can cause
damage and result in leaking.
HAND TIGHTEN ONLY.
Turn wrench
to right;
sump to
left.
