- Clamp the PVC pipe to a workbench or table.
- Snap chalklines the length of the pipe at 10 o'clock, 11 o'clock, 12 o'clock, 1 o'clock and 2 o'clock.
- Drill 3/8-inch holes approximately 3 inches apart down each chalk line.
Things You Will Need
- 4-inch diameter Schedule 40 PVC pipe
- 3/8-inch diameter drill bit
- The holes in the French drain pipe typically are placed down in the trench to allow for maximum water penetration.