On Tue, 03 Oct 2006 14:46:38 +0100, The Natural Philosopher
wrote:

As I discovered when I installed a mixer on ours, before fitting the
shower head. I left the head blanked off, but forgot to switch the
shower off after leak testing..it became a matter of pure luck as to
whether any given hot or cold tap would deliver hot, or cold water..in
fact most did both, at different times..

Thereby simulating a combi boiler.


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