On 31/03/2021 18:09, T i m wrote:
On Wed, 31 Mar 2021 17:53:40 +0100, Mike Halmarack
wrote:

snip
A mate replaced the 'boiler' type water heater for an instant oversink
type in his shop:

https://www.tritonshowers.co.uk/t30i-handwash


Crikey! Yet more unexpected possibilities for consideration.

Oh, forgot to mention, we are also in a fairly hard water area.

I got one of those (3Kw) put in our garage after I found the Ariston
under-sink heater left by the previous owner tripped the RCD when I
switched it on.

It's worked well for 8 years, although in winter when the water feeding
it is very cold, it needs to be on full, and even then the flow is
fairly low. It's quite sufficient, though, for washing hands after a
messy job, and the spray head actually helps shift the grime. We are in
a hard/very hard water area (Ca CO3 level is 281mg/litre), as it comes
from a chalk aquifer under the Downs. I've used descaler now and again
on the spray head, but never on the heater itself.

--

Jeff