Been a plumber for 30 years in a cold climate. I have worked on, replaced, installed hundreds of frost free sill ***** every single one was a complete piece of S&$T . In theory they are a good idea, I don't know why a quality one cannot be made. If you must use one Woodford is the best but the...
I have only used it two times, I was happy with it and have no complaints but, it is the only one I have ever tried so I have nothing to compare it to.
This is an absolute no brainer, go with the indirect. You should ask these questions on a plumbing forum. The people here suggesting anything other than the indirect are badly miss-informed
It is a plumbing tool to remove recessed clean outs. I don't know how to post pictures from my ipad but if you google recessed clean out plug you will see what I mean