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Old 11-10-2008, 19:52   #34
park381
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Re: For those of you who want to monitor you electricity usage

Quote:
Originally Posted by Neil View Post
It all depends on the plumber at the time and 35 years ago when it was first installed
If it had been installed 35 years ago, there would have been 2 circuits from the boiler.
Circuit 1 - Gravity primary hot water circuit including cold feed and expansion. This circuit would have been 1" or 28mm ( will draw it for you if wish)
Circuit 2 - This would be the heating circuit, complete with circulating pump, this circuit would have been 3/4" or 22mm.


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