I asked woodford about the 19 and pressure relief and they recommend I use the 25 since it will always drain down.
Been installing arrowhead for, as long as I can remember. Never had a problem with any of them. Probably installed around two thousand of them in my career
Woodford is great. I always use it in some of my customers.
Check out this old post
I love the woodfords , easy to get replacement parts, and the arrow head brand as wwell.We all know Mansfield sucks big ones , and preir sucks to.