Schedule and Schedule pipes have the main difference of sizing and diameter. Schedule is the standard of wall thickness that has been adopted by the American National Standards Institute. Types of Metal Steel Stainless Steel Aluminum Copper Brass Tool Steel, Drill Rod Tool Steel, Drill Rod Tool Steel ADrill Ro AIR Hardening. Schedule Pipes will be rated up to 4PSI compared to a rating.
Schedule and schedule pipe are made from the same material. A schedule pipe has a thicker wall even though its exterior diameter is similar to a schedule pipe.
If you dont know the difference we cant help you here. PVC is available in many colors though, so be sure to check labels when purchasing. The thickness of the PVC wall becomes more important when dealing with larger pipes. Having the same outside diameter is possible because the extra thickness of a schedule PVC is inside the pipe. Because Schedule pipes and fittings are thicker, they are better applied to jobs that require higher in-pipe pressure or higher water temperature.