I initially had the same problem as others with installing this filter. Finally, after searching, I found instructions on this product's webpage (2nd photo). I wish Kohler would provide similar instructions in the brochure that comes with the product so consumers don't have trouble mastering the first step. . As for the filter itself, I followed the instructions after installing it on the system. It says to run water through the filter for 5 minutes, which I did. A few days later we still saw particles floating in the water. I turned on the faucet for another 5 minutes and it still wasn't fully cleared. For this reason I am deducting 2 stars from the rating. A NOTICE. I have a K-200 system and it fits if you follow the instructions above.
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