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Posted by Joe Brix on January 19, 2006 at 20:24:03:
In Reply to: Re: Boiler posted by Alan on January 19, 2006 at 13:28:54:
Yes it's true. Sometimes pipes are too tight passing through wall studs, floor plates. The pipe expands and snags in tight holes. Sometimes the force will allow the pipe to snap through causing loud bangs. Older baseboard sometimes has the pipes lying right on the metal hangers holding up the baseboard cover: metal to metal grinding (new baseboard has plastic glides for the pipe to rest on). The aluminun fins also expand at a different rate then the copper pipe: another source of noise. You can't get rid of all the sounds. Only replacing with cast iron Baseboard and radiators would solve most of the sound issues.
Try reaching under the basebaord and move the BB up/down and see if the sounds are familiar. I took some old rubber hose, cut small pieces and put a slit down the hose. I then put them on the hangers where they touched the copper tubing to cut down on some of the moaning sounds from the metal to metal contact.
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