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Posted by Harold hydronicnetwork.net on October 31, 2002 at 07:56:33:
In Reply to: Cast vs Steel ??? posted by Paul G Vestigo on October 31, 2002 at 05:30:07:
Six years is a short lifetime for a cast boiler and is a sign that the set-up of the system probably included a pressure over 2-1/2 pounds and an automatic water feeder. These assure that water is thrown out of the boiler and steam lost to be replaced with fresh oxygen-full water to rust the sytem. The banging helps create more leaks to bring in more fresh water.
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