I am trying to help a family that their house burnt down and they are trying to build a new home on very limited funds. I am asking for some direction on basement rough in plumbing. What size of drain pipe lines do I need for the basement, 2"? Can I use PVC or do I need CPVC? Any basic direction on how to do this correctly and quickly would be greatly appreciated.

You have to be little more specific as to how many plumbing fixtures you plan on installing.

But in general: 3" or 4" pipe for toilet, 2" pipe for washer, shower, tub, floor drain, sink. Make sure you use proper transition fittings to assure good drainage. Don't forget to install air vents for each plumbing fixture you put in. Important: install traps for shower, tub and floor drain. PVC or ABS is OK for drains. All materials can be purchased in Home Depot or Lowe's.

I am trying to help a family that their house burnt down and they are trying to build a new home on very limited funds. I am asking for some direction on basement rough in plumbing. What size of drain pipe lines do I need for the basement, 2"? Can I use PVC or do I need CPVC? Any basic direction on how to do this correctly and quickly would be greatly appreciated.
Most bathroom groups are roughed in like this.
Toilet connects to sewer main with three or four inch PVC, CPVC is used for the hot water lines. Lavatory connects to toilet drain with two inch and runs a vent off the top the stubout tee out the roof or revents back into a dry vent in the attic.. The toilet wet vents through the lavatory vent and the tub/shower connects to the lavatory drain with teo inch PVC and is wet vented by it. This is a normal rough in and is acceptable both by local and state codes and also The Standard Plumbing Code Book in 90 percent of the country. Check your local codes.to make sure you're not in the excluded 10 percent.. The vent off the lavatory may be run out the roof or revented back into a dry vent in the attic or if you're reventing back into a fixtures dry vent you must make your connection at least 6 inches over that fixtures flood rim. If you're planing on adding a kitchen then it goes down with two inch drainage and it's own vent. Good luck, tom