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FLooding a Boiler in the Summer

Rodney Summers
Rodney Summers Member Posts: 748
I have an old Mouat Vapor System in Akron OH. Is it a good idea to flood a boiler in the summer to prevent exposure of the boiler to air and corrosion of the cast iron? Also I get knocking in two radiators which are the first on the main supply loop after the boiler cycles down. Does anyone know what causes this?


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