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Posted by HeatPro on February 06, 2006 at 13:37:56:
In Reply to: Re: Ancient Sunray Boiler Firebox Leak posted by errol on February 06, 2006 at 09:54:01:
It is more likely a meltable plug that was important to damp fires in solid fuel boilers. The answer as to whether it can be repaired of replaced is the thread and casting condition arund the leak.