In article ,
Paul Giverin writes:
I'm having a non-condensing combi boiler fitted in a couple of weeks to
replace the existing back boiler and HWC system. I've been told that I
won't be able to use my existing power shower which gets its supply from
the HWC and a cold water tank in the loft.

Is it the case that I definitely need to replace the shower? If so, what
are the alternatives? Is a thermostatic shower mixer a good idea? There

You need a thermostatic shower specifically designed for
combi/multipoint use, and the cold feed will need replumbing
to come from the water mains, not the header tank.
These are designed to handle full pressure cold, anything
from low to full pressure hot, and know they can't change
the temperature just be reducing the hot flow (which with
a combi/multipoint often just makes the hot water hotter to
exactly cancel out the effect of the intended change).

Also, take the pump out (have heard of cases where it was
left in, and explodes a few days later with the mains water
pressure).

is one on sale at Lidl next week for a very good price :-

http://www.lidl.co.uk/gb/index.nsf/p...c_Shower_Mixer

Not enough detail. You would have to check what's written on
the box and/or the instructions with regards to suitability.

I bought a Gainsborough a few years ago, and that came in
3 types. IIRC, they were equal pressure inputs, high pressure
cold with low pressure hot, and combi/multipoint. Two of them
could easily be converted between by swapping a part, but the
third was completely different inside.

--
Andrew Gabriel