Help, stuck ball fitting valve beer line

Hi, any tips on how to remove ball fitting beer valve? I have a7/8 socket wrench and used all my strength to removed this stubborn valve. I'm all ready to keg except for this problem

 

I'm going to assume you are referring to the Out Post on your keg.

Bring it over to the kitchen sink, lay it on its side, and pour hot water - even boiling, if that's what it takes - over the post, then give it another try with the wrench...

Cheers!

 

Use the Kung Fu grip ! Not to be a wise guy but just In case, righty tighty, lefty loosey.

 

I had one that I had to use my impact wrench on.. sometimes they take a lot of force to get off if they haven't been cleaned or were put on too tight