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[caper]

Hello everyone,little problem, second year in my home, i have a heatmaster 5ooo, i have cast iron rads on my main floor, there is one rad that makes a large bang every time the heat cuts in and when it shuts off, everyone i speak with has a different opinion on what it is, and  no there is def no air in the system, the rad is seven feet long,pretty big one,no other rad makes any noise other then this one and each one is on its own loop, every plumber and heat guy has a solution, any good suggestions, the noise actually startles me in the middle of the night when the heat cuts in... thank everyone...

[baldwin racing]

Hello everyone,little problem, second year in my home, i have a heatmaster 5ooo, i have cast iron rads on my main floor, there is one rad that makes a large bang every time the heat cuts in and when it shuts off, everyone i speak with has a different opinion on what it is, and  no there is def no air in the system, the rad is seven feet long,pretty big one,no other rad makes any noise other then this one and each one is on its own loop, every plumber and heat guy has a solution, any good suggestions, the noise actually startles me in the middle of the night when the heat cuts in... thank everyone...

if it's that big it maybe from expansion from the heat? the bigger it is the more it will expand? I don't know if you ran a mixing valve on it if it would help meaning the hot water be reduced down so it does not hit it all at once? that's a tuff one maybe someone elese has better ideas?

kelly