Make sure the pipe is not firmly secured to the wall studs. Use a felt or
balled up insulation pad to buffer the pipe from the solid structure of the
wall framing. Use plastic isolation hangers (flying A holes) instead of
metal or plastic plumbers tape for securing the pipe. Same treatment for
supply pipes.

If not the sound will transmit from the pipe to the wall like a diaphram. I
always insulate interior walls during remodels mostly for sound deadning and
usually costs less than $100 per room.




"Mark L." wrote in message
...
Greetings All,
Is there a product that will minimize the noise from 2" PVC waste piping
that runs overhead through the ceiling? Since all of the walls and
ceilings are opened up and almost ready to be drywalled, this is the time
for some sound insulation/isolation. Can anything be wrapped around the
pipes, or is the sound deadened by filling up the stud/joist bays with a
product? Thanks in advance, Mark L.