Dave,

Well, this is just my oppinion. I have a 1.5 acre lot and I got a
sizeable Kubota tractor. I don't want to risk collapsing it as I know
it collapses easy as well as I believe that it clogs easier than a
smooth wall pipe due to the corrugations. Either way, I think I will
be using some sort of smooth wall alternative which seems to be SDR26
or SDR35 pipe.

Thanks.
Curtis