[masraum]

Originally Posted by Bob Kontak

Are you supposed to open the outside hand crank valve after shut off? Makes sense to lose any standing water inside.

If you have a way to empty the pipes, that's ideal. I don't think most pipes will empty. I wouldn't hurt, I'd think to open the valve and let anything flow out that will.

I've heard it recommended to add a way to use compressed air to blow the lines out.