What's the best undermounted filter? I want to filter the cold water on my kitchen sink.

Asked by alan
Warren, NJ

want to mount filter under sink and install separate cold water faucet on top of sink


David Willson

Answered by David Willson

Sebastopol, CA

Advanced Home Performance

September 24, 2012


There is a vast range of brands with no 'right' one so I suggest you do your research - use Consumer Reports if you're a member, read the reviews on Amazon, and google 'under sink filter review'. 

I'm not sure what type of filter you are considering.

  • What is the water issue you are trying to address?
  • Do you need a simple filter system that traps particles and/or chemicals?
  • Or a more expensive and larger Reverse Osmosis system that produces more clean and pure water?

For most city water, a 3 stage filter is adequate - prefilter, charcoal filter, and postfilter. You might want to buy an extra set of filters so you have them on hand when it comes time to change them, which is 6 to 12 months, depending on the filter brand, and quality of your water. 

Whatever type or brand of filter system you end up buying, see if you can get a 'premium' faucet as an upgrade instead of the generic plastic one that may come with your kit. I believe it's worth the extra expense.


For more information:

Read "Can you recommend a whole-house water filtration system?" a Q&A answered by Tammy Schwolsky.

Tagged In: healthy water

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