pinhole steamer in cast iron boiler

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Old 09-20-12, 11:14 PM
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pinhole steamer in cast iron boiler

my 13 y/o cast iron oil boiler developed a pinhole leak, obviously on the bottom where i cannot reach it. i suppose i need a new boiler [you'd think they would last longer than 13 years]. on the other hand, there is no leaking when the boiler is cold; there is only some moisture and rising "steam" when the unit is on. i know for car radiators there are additives for this sort of thing. is there anything i can try for this unit??? the heating system is all composed of european flat panel radiators or 3/4" copper baseboards.
 
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Old 09-21-12, 06:18 AM
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on steam ship boilers, we used to increase the phosphates dosage for chemical treatment, in turn it would reach the leak, come in contact with the air and coagulate the weeper. maybe there is an maintenance additive available for making such a repair?
 
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Old 09-21-12, 07:43 PM
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I'm confused is this a steam or hot water boiler? At first I thought it was a steam boiler.
I do not like the use of stop leaks in water boilers as it coats everything and decreases heat transfer in the boiler and radiation.
In steam boilers it affects the steaming rate.
 
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Old 09-22-12, 06:39 AM
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good point about the film forming and reduced heat transfer effects.
larger boilers have greater circulation and the ability to bottom blow - sometimes it really is comparing apples to oranges.
 
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