[quote author=JerryD link=1107193861/0#4 date=1107284465]Hi Greg, I get it now! Sounds good.
Will 'gravity circulation' take over when the pump is off? In other words, doesn't the pump itself act as a barrier to the gravity circulation?
What current does a little bronze pump draw? It can't cost much to keep it running continuously (just using a timer for main off periods) ? This would then save the need for a stat?
Are my ideas rubbish
Just trying to get me head around what I can do here at JerryD towers
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No;because there should be non-return valve fitted between the cylinder and pump to avoid reverse drawoff