I recently purchased a Kenmore refrigerator without the water/ice center and instead bought this inexpensive filtration system for my tap.  The Brita unit went on in under a minute - only needed a wrench to loosen and remove my faucet's aerator.  It came with assorted ring-adaptors in varying sizes for faucets with 'internal threads', none of which were needed for my installation.  Instructions were short and simple, 3 steps.  The water tastes fresh and clears quickly of air bubbles.  There are two tap settings to bypass the filter for non-drinking use. I bought this cheaper plastic unit to...