advice needed on "unscrewing" sewer pipe from black tank etc.

[Henry Jay Hannigan]

Forum members whove done messed with grey and black tanks.
I am about to put on drainmasters and have all the ABS pipe and elbows
etc...I am concerned that I have to get off the "screw in" connector
attached to the black tank....question..is there a special tool
neede?? looks like ma big nut is attached to the black tank...does
the screw attach to that? does any of this make sense...for anyone
who has tackled this job..any cautions for me??? I am about to dump
and flush my tanks and start the job in a couple hours....hope Tom
Warner is listening...

thanks..hope to hear from someone.....
Regards,
Hank Hannigan
80FC31