Definitely going to fully drain the tank as much as possible its installed without a drain pan… on short cinder blocks.
but a hose then a few towels and a shop vac will hopefully cut down the mess.
I have heard of a few tricks such as
tightening the union to unscrew the nipple, putting a pipe cap on,
or even pinning it with a drilled pipe cap and a pin.
Any idea if those work? I dont even know which way the threads are yet.. because once I start this I HAVE to finish it.. want to be fully prepared with tools and ideas ahead of time.
I have quite a few automotive tools.. not too many big pipe wrench type though.
Appreciate the advice fellas.