Clanging rads

john_58

Hi, I have a new (to me) old house (1890's) with large cast iron rads and a modern boiler. When the temperature changes (up and down) in the rads, they all clang very loud. The holes the pipes go through are plenty large. I have installed some auto vents on the top floor rads. I don't believe it is air causing this anymore. I have given up on the modern thermostat's program and am now holding the temp at 20C. Still some clanging when the heat is called. Can i install an aquastat (i think) to constantly hold the recirc water at say 35C and run it parallel to the thermostat upstairs?

fritz

your rads are breaking up, get new ones or clean them out.

Mad Dog

WHAT??????????????????????????????????????????????????

are you talking about Fritzy? Mad Dog

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tommyoil

Fritz

Can you post a picture of what a "broken up" radiator looks like. It would be interesting to see. If what you say has ANY merit the 100+ year old radiators I see every day are replacements??? Please explain as I dont get it. And as for you John, I would put the idea of buying new rads on hold for awhile. At least until we get to the bottom of what a broken up radiator is.

john_58

thanks, i think? So is clanging normal?