Question: what is the difference between solid core and cellular core pvc pipe?
Answer: Is it as strong as solid PVC pipe? A. ... The inside and outside walls are solid PVC, while the inner core is cellular (or foamed) PVC, a material that includes tiny bubbles of entrained air. Cellular-core PVC pipe is available in various wall thicknesses, including Schedule 40 pipe for DWV and thin-wall sewer-grade pipe.