Whatever he did, he can't suddenly start dumping water onto the
neighbors property, creating a flood around his shed, where it didn't
occur before. And I agree with Bob. From the way it's stated, it
appears far more likely that it's not just a foot of corrugated pipe.
I don't think I've ever seen anyone use a piece of corrugated pipe to
move water just a foot.
But let's ask Perry exactly what he did, how much further he
redirected the water, etc.
He ran what must be about 30' or 40' feet of corrugated pipes from
downspouts on both ends of his garage into a "T", and then ran them down to
about 6 to 8' up from the corner, so it drains right into my shed area. THe
drains pipes are orders of magnitude different from a 6' drain pipe