What is Schedule 40 and Schedule 80?

Hi gblake, pease click on the link below and you will see the differences between schedule 40-80, the wall thickness on Schedule 80 is more than schedule 40, Thanks.

John

PVC and CPVC Pipes - Schedule 40 & 80 (http://www.engineeringtoolbox.com/pvc-cpvc-pipes-dimensions-d_795.html)