In a message dated 8/27/04 3:54:42 PM GMT Daylight Time,
mcarpenter@concordefs.com writes:
Graham,
Are you sure the water gets sucked back in when it cools? I can see how the
water gets pushed up into the expansion tank when it expands but the
pressure cap will be closed when the water cools thus stopping the water
---From returning from the expansion tank.
Patrick Griffin
If my understanding of physics is correct, it is not the water that expands
but air in the system. It contracts on cooling, sucking the water back.
David
G-SHSH
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