We're just doing 4" SCH40 below the gravel and it will daylight out behind the shop. I don't think we'll have a problem with freezing and if it does it is a minimal amount of water.
Originally Posted by joes169
Sounds like a good plan, but don't forget to drain into a catch basin at some point so you have a place for sediment to drop. AND make sure the pipe is well below the frost line outside, I've had to thaw mine twice this winter already, and it's a real PITA.......