Product review (1 stars): These are garbage.
These did not work at all and sent us on a crazy journey of buying a lot of bottled water, having our water professionally tested and miserable not feeling we could use the water from our refrigerator.  Initially, we did replace what we thought was a faulty filter with a new one, but the taste did not improve.  Then realizing that my husband changed the brand of filter to these. I reordered an official LG brand and everything went back to great tasting water.  The three practically new ones went to the garbage.