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Old 12-02-2010, 06:44 PM   #1
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Went house today and the home owner said his pipes moan. So they took me into the master bath and turned on a sink, after a few seconds started to hear moaning /squeal sound. In my 13 years almost 14 years never heard water pipes make that noise. They have a well not city water. Ever heard of such a thing?
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Old 12-02-2010, 07:17 PM   #2
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Went house today and the home owner said his pipes moan. So they took me into the master bath and turned on a sink, after a few seconds started to hear moaning /squeal sound. In my 13 years almost 14 years never heard water pipes make that noise. They have a well not city water. Ever heard of such a thing?
Could be the fill valve in water closet. Was it on both hot and cold?
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Old 12-02-2010, 07:19 PM   #3
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Is this something that just started happening out of the blue? Anything new recently installed?

I've seen this a few times and it tends to be a pain to diagnose. If the faucet in the master is an older type using stems with rubber washers it might be just a loose washer vibrating and causing the noise. I found that once, but it was localized to the cold side of one faucet.

Just for grins and giggles, check the water pressure. PRVs seem to fail in the full open position around here and sometimes this causes the pipes to "sing" if they are copper. I've found this to be the case a couple of times when the problem just developed spontaneously and the whole house seems to be affected.

One time, it was the damndest thing, HO had installed his own water heater. The moaning pipe situation happened shortly thereafter. When I disconnected the heater (shut offs on both hot and cold) the moaning stopped. I looked inside the dielectric nipples and they had some kind of rubber disc installed inside. I pulled the dielectrics and installed 3/4 X 4 brass nipples and the problem disappeared... Weird stuff...

Anyway, hope this helps!
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Old 12-02-2010, 07:21 PM   #4
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hot line rubbing on something maybe
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Old 12-02-2010, 08:37 PM   #5
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Could be the fill valve in water closet. Was it on both hot and cold?
Mansfield 08 Ballcocks are notorious for this.
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Old 12-02-2010, 08:43 PM   #6
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Is there an anti-sweat tempering valve serving the toilet? The old Beacon 610's can cause that (I think they're made by Raven now, or maybe Legend). Could also be a loose washer in one of the faucet stems.

Last edited by Ishmael; 12-02-2010 at 08:47 PM..
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Old 12-02-2010, 09:34 PM   #7
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This probably has nothing to do with the above situation but I had one where the dual check at the meter made a moan that was heard in the house copper piping.
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Old 12-02-2010, 09:43 PM   #8
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I agree with some of the above post.
see if u can isolate it to hot or cold of the faucet
or one of the stops
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Old 12-02-2010, 09:47 PM   #9
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9 3/4 times out of ten the homeowner has throttled down the stops thinking they are saving on water. Combine that with a loose washer and your pipes will sing like a canary.
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Old 12-03-2010, 02:06 PM   #10
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I had a call like this it turned out to be the pvc drain was run through holes too tight and would moan and squeak as they expanded when the hot water was running.
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