Typo: Changed 1) to read "Use only Schedule 40....." instead of "Use on Sch..."

PVC is incredibly easy to work and Schedule 40 is good for pressure lines (don't ever use fittings not marked Schedule 40 or Schedule 80 on any line that has water pressure. Non schedule fittings are only for drains where there's no pressure, like sink drains). It's not good for hot water lines either--there you have to use CPVC but I don't know where it's used in the US. We don't use it in NJ.