Thank you! I have a bar faucet that’s attached to an under sink filter (that doesn’t filter down to .02 microns, but filters out chlorine and other contaminants. I wonder if I could attach this to this faucet and have both filters working.

From my understanding 0.2 filter won’t rid NTM you need something like 0.0002 or 0.0005.
It will filter a lot of nasties and viruses yes but not the NTM. If it is a carbon filter that can also breed mycobacteria apparently they thrive in what they call a gac granulated carbon filter.