He's already said that he has a 3 port motorised valve so it must be fully pumped. Water going through the coil goes from 70°C to 60°C when the temp within cylinder is no more than 48°C and probably very much less at the level of the coil, so the water must be moving through the coil at a fair rate otherwise the temp drop would be lower.If it's fully pumped than you may well have "pumping over" in the loft - have a look.
I have a hunch that this is the biggest clue, because IIRC it puts the age of the cylinder in the region of 30 years (or more).Ravel said:I have poked my finger under the insulation jacket...
It is a pumped system with one 2 way motorised valve giving me heating and water together or just water on it,s own.
Regards Ravel
I think that's what's called "having a life"! What would we know about that, Softus?At least we do know that the OP has had a small domestic situation, and a shopping trip, and a celebratory outing, all within one day.
It's good isn't it? 36 posts on the topic and we still can't really be sure whether or not the DHW circuit is pumped
Pumped or gravity?bengasman said:Now you know why i prefer a combi
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