Bathroom Cold Tap on Mains OR from Header tank

3 Dec 2012
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United Kingdom
Just planning a refit of my bathroom. Coud someone help me please.

The shower Hot & Cold are from the vented hotwater cylinder & header tank, so all at same pressure and OK.

Should the cold water sink tap be conneted to the cold mains or cold feed from header tank? Is there a WRAS/Authority requirement to do either? If its connected to the header tank, is that considered to be drinking water standard?

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It makes more sense to have the hot and cold bathroom basin taps from the same source - in your case from the CW cistern/cylinder.

Stored water from the cistern is not drinking water

If you want drinking water then you will need to connect the cold tap to the main
I am not a plumber but in all the houses I have lived so far, the cold basin tap in the bathroom has been connected to the mains. I checked to make sure it is drinking water. Sorry if anybody feels offended but the alternative looks to me sooooo old fashioned.
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You say cold water tap so i take it it's not a mixer tap but a single one? If that is the case then take your feed for it from the mains.

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