Assuming the corrosion is limited to just the 6 - 8 feet of pipe that lays in the lake, could I drain the lake down to expose "good" pipe, cut it off, install a 20" PVC into end as far as I can ram it (but at least 3 feet), pump calk into space between pvc and corrugated, attach pvc to new stack pipe?
I know this sounds complicated, but it would save me a TON of $$$.
