"The Reverend Natural Light" writes:
Car stereo people use an adhesive backed insulating sheet called
Dynamat to dampen noise. I've wondered how well that might work if
wrapped around a PVC drain pipe.

Care stereo folks use dynamat because it's well marketed, and thin
enough to do a little something in teh space they have. Typically you
have a lot more room to work with in your house vs a mobile
installation, so it's a fair thought that you might get more bang for
the buck with other materials.

Best Regards,
--
Todd H.
http://www.toddh.net/