This 3 way tap is to be purchased and used only with the Bridgepoint Pressureless boiler (item code: BPW401110) found also on our website. This 3 way tap allows the end user to enjoy hot and cold kitchen tap water from the right lever, and instant boiling water from the left lever, also equipped with a safety open feature. The boiling water inlet needs to be supplied from a Reverse Osmosis feed (this is not included and needs to be purchased seperately, item code: BPW301810).