I wondered about that serpentine pipe dealie.The winding thing on the right side of the coop was put there by the guy who built it for water, nipples underneath. I don't use it, though. I don't like having to lift a 5 gal bucket that high to get it into the opening when I can do it on the ground and move it where I want. Plus, it would freeze in the winter.
I figured it was tied to a gutter system to catch rain off the roof.
I'd take that sucker out of there.