This 4 way tap is to be used with the Chiller (item code: BPW401210) found also on our website. This 4 way tap allows the end user to enjoy hot and cold kitchen tap water from the right lever, and chilled or room temperature drinking water from the left lever. The chilled water will be supplied from a Reverse Osmosis feed (this is not included and needs to be purchased seperately, item code: BPW301810).