I have noise in my copper pipes when hot water is run through them. It
sounds like an old steam radiator banging but not quite as loud. I know
that it is not water hammer. Can anyone tell me what is causing this and
better, if anything can be done to stop it? Thanks.
As the copper expands, it rubs against a joist or stud or maybe a heating
duct. It can be difficult to pin down. You can start to listen around to
narrow it down. If it doesn't bother you too much, just live with it.
Is it the same principle thqat would apply to copper pipe hot water
baseboard heat?......cuz i'm in a rental unit, 3 floors, boiler in lowest
level,master on the third level.....and this system "talks" aplenty....had
that zone drained once and refilled to rid of any air in the line, and the
"clanking" is still there....do you think this is also a joist rub?.....bob
Yes. The thing is that I find these sounds to be soothing and part of a
house's personality. I wouldn't expect it in a brand new construction, but
over time, wood swells and sags. I like the noises my home makes!
However, when you completely drain a hydronic heating system, the new
water always has air dissolved in it. Usually the automatic air eliminators
do the trick, but sometimes it must be bled from the highest points in each
zone. Air doesn't make "clanking." It usually sounds more like water
thanks for the reply. So when i construct my new home with hot water
baseboard, i need to make sure that every penetration through wood needs to
be wrapped in that black foam pipe insulation?.....also, there seems to be a
trend toward plastic piping, "pex" i think i recall reading....is that ever
used for the runs to the fin assembly?.....thanks....bob
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