A.O. Smith AO-US-100-R is a replacement filter used for The Clean Water Machine and The Clean Water Filter Fridge/Freezer (AO-CWM and AO-FF) water purifiers. For a continued contaminant removal and system performance, use only certified, genuine A. O. Smith replacement filters like AO-US-100-R.




Why Choose Our Product


    • Easy to install
    • NSF Certified to Standard 42, 53, 401 and P473




5.5 in.


2 in.


2 in.

Flow Rate:

0.5 (Gallons per minute)

Min. Feed Temp:

40° Fahrenheit

Max. Feed Temp:

90° Fahrenheit

Product Weight:

1 lb.

How It Works

It reduces up to 99% of 77 harmful contaminants including chlorine, chloramine, lead, mercury, BPA, PFOA/PFOS, sediment and cysts with its four filtration methods – Activated Carbon, Catalytic Carbon, Ion Exchange and Mechanical Filtration. It also improves the turbidity of the water.



The filter can last up to 6 months.