"Michael Kilpatrick" wrote in message
...
Does anybody know of a particular model of "undersink" type low-power
electric water heater which is designed for a low-pressure water system
with header tank, not mains pressure?

I seem to be struggling to see anything online which clearly states that
it is (a) for water systems at header-tank pressure only and (b) does
*not* have hot water storage but only provide instantaneously heated
water.

Any particular model names much appreciated.

Michael

You just need to look at the minimum pressure requirement of the heaters and
then you will see what will work...

For every 10 meters of "head" you have (The height of the cold tank in
relation to the tap) you have 1 bar of pressure.(So 10m is 1 bar, 5m is
0.5bar, 2.5m is 0.25bar etc...)

Toby...