[Speedslug]

Too many lawyers chasing plumbers (and everyone else) for liability insurance money these days.

I did a black pipe to hose barb connection on mine, then bar b que hose to another hose barb connector to "b" fitting male connector to my torch hoses.

What you may need to do is find a plumber willing to tell 'you' what 'you' need to do to make it work with your own hands.
That way they have no liability issues.

Around here there is this "home as castle" doctrine that states that a person can do pretty much what ever they want to to their own home even if it does not fit building codes but a hired professional MUST comply with every stinking legislative mind quirk or they can lose their license and get taken to court for all they are or ever will be worth.