I have a steam heating system with the old cast iron radiators.
My question is when the radiators heat up and cool down there is a loud
"banging" noise. Is this normal due to the expanding and contracting of
the iron radiators? Is something loose? Thanks for the info.
Radiators should be angled ever so slightly so that they drain back
into the supply pipe. If they're not, they'll bang from the steam
meeting the condensed water in the radiator. Try shimming up the end
opposite of the supply pipe and see if that solves your problem.
Sounds like the other gent was right.
Make sure the rad is leaning towards the valve. You also may want to make
sure the air vent works correctly. It lets air out until the steam causes
the thermostatic valve inside to close and allows air back in as the rad
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