fred wrote:
Why are the Triton 10.8kw models all shown as for mains water only?

We have a Cara 10.8kW - I'm not sure if it's plumbed off (feeble) mains or
the tank. You can't have any other water demands in the house or it will
cut out and refuse to do anything but cold for some minutes. The dial takes
your trickle of water from 'cold' to 27 varieties of scalding hot with a
temporary and variable sweet spot in between.

I hate it.

Theo