Faulty Black Water Valve

Mr. Jeff wrote:
Well yuk! After a long weekend with four kids needless to say our tanks need to be emptied. so off I go to the local dump station, get all hooked up and pull the black tank valve and....nothing. Not even a dribble. I have now determined that the T-handle stem has separated from the valve gate blade.

So now the BIG question - how do I get this valve open, while connected to a dump line, without becoming a scene from the movie RV? And yes, I will absolutely change it once the tank is empty!

Anybody want to help? :h

OK
I have never actually takem one apart but I think the rod is factory wedged into the gate valve?If so heres an idea.Chip away at the black plastic area where the metal pull rod comes up till u can get the rod out.Wrap tape around the the rod and drive it back in like a wedge into the hole it comes out of and then see if it hold,s good enough to now be able to pull the gate valve open.
Ok if its threaded like wolf says then maybe put tape on the threads and see if it will hold at least enought to get it dumped