On 30/08/2020 20:01, David wrote:
On Sun, 30 Aug 2020 09:10:24 -0700, fred wrote:

On Sunday, August 30, 2020 at 1:38:31 PM UTC+1, NY wrote:
"fred" wrote in message
...
Why are the Triton 10.8kw models all shown as for mains water only?

Maybe they have a minimum flow rate and/or pressure that a typical
tank-fed cold water system couldn't manage. Why anyone would want
tank-fed cold water bewilders me, since the same feed cannot also feed
the bathroom taps where you might want to drink the water.

Are new houses still built with tank-fed hot or cold water, or is
everything mains-fed these days?

So I presume a pump would fix that. Our mains water pressure is very
low. Water just about creeps up to the tap and falls out.

You would have to pump tank water (can't suck water out of the mains).
In which case IMHO you are far better off heating a cylinder and then
pumping tank water through hot and cold.
Far better shower than any electric shower, and better than most if not
all combis.

One of the flats on the second floor of my block has a (noisy, sometimes
leaky) pump to increase the pressure. I don't know how it works or
whether it's really needed.

--
Max Demian