On the Durso, is there an opening below the 90º? Yes
Is the top open? Is there vinyl tubing attached to the top like in the Stockman Standpipe? What is the tubing for? No, not really. It is a PVC Cap with a little hole drilled in it to let just a little air flow. The Vinyl tubing is used to quite it down even more.
Aren't Dursos installed for quiteness? Yes, ma'am.
And don't be sorry for the questions. Someone else may have the same ones, but don't want to ask
