"Tim+" wrote in message
...
Dave Plowman (News) wrote:
In article
,
Tim+ wrote:
Well yes, but surely the main problem is having a way to increase
the pressure? I guess you could always connect it up to the
mains....

I think there is a reason people pump the outlet :-)

Pumps are noisy and relatively expensive.

Compared to changing a standard cylinder for a mains pressure one?
And all the additional work?

Go back and read what I wrote. I'm talking about using the pressure
capabilities of your existing conventional vented cylinder.

As I said, I think most of are rated to at least one bar (some are higher)
and boosting the system pressure to that level would give an appreciably
improved HW flow to most systems.


I have seen (some foriegn place) the expansion pipe taken right up
projecting beyond the top of the chimney. (With return bend on top) Galv.
Pipe
There was a reducing valve on the inlet.
If it stuck, the water came out of the top & ran down the roof.
I think the pressure was about 2bar so about 30ft head.
Galv. steel hot water tank I seem to remember. Rivetted.

Hey, you could also use it for your TV aerial as well.