"John Rumm" wrote in message
...
Doctor Evil wrote:

It can be I said "Having by-pass valves with condensing boilers is not
recommended and should be avoided". Sound advice. There are many ways
to

Given that the bypass will usually only come into play when the pump is
on overrun and there is no call for heat from any stat, so the boiler
will be off. So who cares?

You really don't know.


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