WinterDeere
Super Member
- Joined
- Sep 6, 2011
- Messages
- 5,703
- Location
- Philadelphia
- Tractor
- John Deere 3033R, 855 MFWD, 757 ZTrak; IH Cub Cadet 123
My downspouts all empty into underground piping, mostly 6" SDR-35. Never had an issue with any of them backing up due to freezing, despite some areas being relatively shallow due to changes in terrain. They've been that way for more than 30 years, now.Aren't you worried about freezing? I got some 3" aluminum pipe and put mine above ground. They are high enough that I can easily mow under them.
I suspect there is very little water flowing into them at times when they're most susceptible to freezing, because nearly all surface water is also tied up in ice at the time.