No! Steel is a very bad choice for plumbing, as it rusts and can poison your water. PVC, copper, or clay pipes are recommended for plumbing.
If the local and state building codes allow PVC for plumbing waste and vent then there shouldn't be any legal action.
It depends on the plumbing code in your area.
There is not much difference, however, plumbing PVC has a thicker wall, for obvious reasons, namely, water pressure.
There is no PCV plumbing there is how ever PVC piping and fittings
Yes, 711 cement should do it.
PVC should be available at most hardware stores and plumbing stores like Home Depot an such. Anywhere that plumbing supplies are available usually have PVC in stock.
No you shouldn't. It will fail inspection. Use electrical (grey) conduit. It is about the same price and has the proper electrical insulating properties required. The thicker PVC(schedule 40) is best, although schedule 80 is acceptable. (Schedule 40 is required for underground service feeders.)
Galvanized steel is better for plumbing in a bathroom sink. It lasts a lot longer than PVC.
Poly vinyl Chloride.
Depends where you live, going rate for plumbing and what kind of plumber. Most will not use PVC to rough in a house. -( Why are you not using PEX .)
PVC Coated Copper Tubes provide corrosion protection and insulation, enhancing longevity and efficiency in plumbing and HVAC systems.