there are those who are concerned with copeopds which are small bugs which are said to possibly at `times be find in faucet water; therefore if a filter is set up with the faucet with this not be a problom of borer or meraked?
It is permitted to use a filter fitten onto the faucet. As a stringency, one can allow the water to flow into the drain for a short time after opening the faucet, before the water is collected. An external filter should not be used.
We have addressed this question at some length in a previous post. Please see https://dinonline.org/2010/08/10/filter-on-faucet/.