Forget the corrugated pipe if you have any agricultural runoff, especially rice. Single wall corrugated is good for 10-15 years in that situation, we replace it every day. Double wall is better but a pain in the butt to fool with and not as good as steel. Used steel pipe is reasonably priced and will last MUCH longer.
DAN- Just curious as to why the corrugated pipe is bad with rice. Is there a chemical reaction between the two?
