I was chatting to a kitchen place today and when we discussed having a boiling water tap he said if I have a gravity fed system (which I do) then most of the taps on the market won't work properly as the normal hot water tap will just dribble out, or at least not be good enough. I forget the name of the one he said would work, but he basically said that was the only one which would work properly and everything else wouldn't.
None of the other kitchen places I've spoken to have said this to me, albeit I can't recall whether they asked me about my water pressure, so I was a bit surprised so wanted to ask people's views and see whether any of you have had issues?