"John" wrote in message
...
Seems a shame to now
have to add in a non return valve to
stop water drawn off from the hot tap
taking a short route via the cold supply
and the hot water loop return. Of
course he'll now claim he "meant" to say
this all the timeg

snip fishface drivel

It is exactly the same as a thermal stores secondary loop, of which you have
no experience of whatsoever.

You obviously come on this ng to be educated, as your knowledge is sparse to
say the least.

snip more fishface drivel