On 7/8/2010 1:54 AM, scott wrote:

>
> It's different in the UK, the mains pressure usually equates to about
> 10-50 metres plus of head. Any water from a tank in the roof is usually
> *way* lower pressure than mains. For example you can easily block off a
> fully open hot tap with your thumb with very little force, but it is
> tricky, if not impossible to do the same on a mains pressure cold tap.
>

Is this everywhere, though? I imagine in Andrew's Building's case that 
it could be that his building was on a hill, while the building gets 
reasonable pressure on the lower floor, the upper floor might not get 
enough. Where I live, there's plenty of water pressure. But, if your 
building is taller than the water tower, it'll need a tank to get 
pressure to the upper floors.

-- 
~Mike

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