As a home inspector, from time to time you may come across a kitchen sink that has a third faucet in addition to the regular hot and cold faucet. This is referred to as a point of use (POU) faucet and is frequently used to dispense water that has been treated or filtered to improve its quality. If you look under the sink, the system is typically mounted on the wall of the cabinet. In some cases it supplies filtered water to the ice maker in the refrigerator as well as to the POU faucet. The following are some examples of systems, starting at the simple, inexpensive end of the spectrum and ...
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