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Iowa | I don’t think the silting in should be the main concern. Both should be reliable and retain their integrity long term, you can run knife cut rather than regular perforated if you want to reduce the risk of silting in. Have not been able to tell a difference in performance between the two. And you aren’t really comparing apples to apples I would take the 3” in your example for the 30 ft spacing over the 40. Increasing tile size won’t make up for the wider spacing | |
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questions about tile......
