Hello- We have a GAS FURNACE STEAM RADIATORS AND CAST IRON PIPES. Lately when we turn the heat on it makes LOUD LOUD clanking noises. So we just shut it off. Then we noticed a very rusty leaky pipe coming out of the side of it. HELP!!! Im not sure this is a good thing. Attached are some pictures. Could someone tell me what this is and if it could be affecting our gas usuage? Thanks for any advice in advance!
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