Underground drains for gutters

[flusher]

I need to extend three and install one additional underground gutter drain. A friend is supposed to be coming with a ditchwich to dig the trench. Will be using the black plastic corrugated stuff in a big roll from Lowes. Do I just cover it up with the dirt from the trench?

Here's the setup to handle some of the the downspouts on my house. I use 4" PVC pipe, two 90-deg elbows and a pop-up drainage emitter to get the water about 10 feet away from the foundation for the South side of the house.

One the North side I use the 4" black corrugated pipe and run to daylight about 30 feet from the foundation.

 

[bugstruck]

I'm a schedule 40 fan but it's not cheap if you have long runs. I did and I bit the bullet. I had to daylight a few that I couldn't get but 6" of cover over and I run over that with loaded FEL so I figured the corrugated would eventually collapse. You can snake the schedule 40 thirty years from now and not be concerned about where the snake is headed. I will say though, the corrugated flex holds up well if properly covered. Grade is critical on that as any pipe. Get a low spot that can start to collect debris and it's a potential choke point and cleanout problem. Properly installed almost anything works.