[bestgenman]

I learn through vision often.  There are several ways to achieve the adapter result that works.  My solution was to use a Valtera male adapter that had threads for the spiral hose however the threads needed to be removed.  The minor diameter was the inside diameter of the Dupree.  I used a metal lathe however, a wood lathe would work with care and you can find people with these pieces of machinery to turn the part for you.  Mike @landyacht found a male adapter that required no further processing.  In both instances, the fitting was glued into the Dupree.