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Old 16-04-2008   #4 (permalink)
kes36
Junior Member
 
Join Date: Apr 2008
Posts: 10
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Default Re: Header Tank Overflow 2

Do you have a feed and expansion tank for your heating? if so, is the tank sited above your storage cistern?, if it is it could possibly be a slit or pinhole in your coil.
Do you have a shower mixer with mains cold water and tank hot water?
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