thomas rubino wrote:I think the 3" will work fine but 4" would be better.
1.5" poly (black) pipe is at least 2" outside diameter. After you backfill, over time your hard pipe will slowly get a dirt/mud layer that fills in on the bottom.
If you have to push/pull a coupler with hose clamps on then 3" suddenly isn't so large.
what does this mean please?
the NRCS is involved