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Edwin Pawlowski Edwin Pawlowski is offline
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Default Air in Wood sove back boiler ??


wrote in message
...
Can anybody help here-We run a wood burning stove with a back boiler
for hot water. After being on for half an hour we get a loud knocking
and have to turn it down. Is this air in the back boiler- and how does
it stay their- cold feed at bottom/hot at top. Can I cure this-
chemicals added to feeder tank? or some sort of air outlet value????
22mm pipe I think Any Advise appreciated.


I'm not familiar with your setup, but I am familiar with steam boilers.
Sounds as though you are heating it up enough to make steam. The steam is
making water knock, a very common thing that can damage pipes. You should
be circulating the water to maintain a more even temperature below the
boiling point. Adding chemicals won't help.