Is copper more quiet than pvc?
I must have a section of 3" drain pipe, about 9 feet, that will be coming from the upstairs bathroom exposed in the living room. I may end up boxing it in later. Cast is just too heavey for me to support properly, so I'll have that exposed section in copper or pvc. Is copper ANY quiter that pvc at all or should I just keep the whole run in pvc?
Foam Core / Cellular Core
PVC is available in a composite pipe made up of at least 3 layers extruded together to form a pipe. A thin solid PVC layer on the inside and outside with the majority of the wall thickness made up of a PVC foam sandwiched between the two layers. Some manufacturers us a non-PVC foam core.
Some benefits of the foam core pipe would be that it is much lighter for ease of handling and shipping and uses less raw materials which all bring down the cost, and it is somewhat more rigid and also quieter. The Cons are that the product is not as strong as its solid wall counterpart and therefore is not approved for all the same applications.
ABS is also available in a foam core type composite pipe.