drinking

Hi there moved into a new build. Have always wondered why the cold tap in the kitchen seems to feed water that is not very cold (Even when ran for a good few mins) Realised today that when I run the cold tap , a pump beside a tank in the attic activates which makes me think it’s feeding water...

Just had the though the other day that, as hot water from combi boilers does not normally get exposed to any air and is always under pressure, is it technically safe to drink? :D Not saying it would taste nice or be a recommended thing to do though! Regards: Elliott.