I put cutting line out there as a possible choice........not as necessity.
You'd be amazed at how many parts get ruined when people simply twist the one outboard nut instead of using a backup wrench. I watched that damage all day long.
Of course I'd take the screw down fitting loose first, but that's just me. Others have totally different viewpoints, not that all of them make sense. Come to think of it, maybe mine didn't either, LOL.................I got drain plugs, I can laugh at the rest.
I was just thinking about tapping into lines for addition of a cooler and translated it to draining fluid too, maybe not the best way............somebody kick me.