Re: Hammer noises in wall from 2nd flr sink???

Posted by Herman Fong on February 01, 1999 at 21:58:39:
In response to Re: Hammer noises in wall from 2nd flr sink???
: When a second floor sink drains and its cool or cold outside : and the drain water is warm or hot. The wall where the pvc drain : pipe runs sounds like some on is hitting it with a hammer while the : water is draining. No other devices cause this noise. I have opened up : the wall and all I see is a 3" pvc pipe? can someone tell : me what causes this hammer noise and how to correct it? : thanks : Neil Monk :Home Depot has a anti-hammer unit that attaches to the waterline at the water heater. It lookslike a propane tank.They have different type for apps.

Posted by Herman Fong on February 01, 1999 at 21:58:39:

In response to Re: Hammer noises in wall from 2nd flr sink???

: When a second floor sink drains and its cool or cold outside
: and the drain water is warm or hot. The wall where the pvc drain
: pipe runs sounds like some on is hitting it with a hammer while the
: water is draining. No other devices cause this noise. I have opened up
: the wall and all I see is a 3" pvc pipe? can someone tell
: me what causes this hammer noise and how to correct it?
: thanks
: Neil Monk

:Home Depot has a anti-hammer unit that attaches to the waterline at the water heater. It lookslike
a propane tank.They have different type for apps.

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