RV toilet replacement.

[Gary] Can anyone help me with the removal of the fitting that goes down from the base of the toilet into the holding tank? It turns like it&#039s screws in but I can&#039t get it out, pulling dosent seem to be the answer ether. All screws are removed. I have a Sealand 510 that had a leaking valve and I am replacing the carpet and letting the floor dry, and would like to replace this fitting if I can get it out. Any help would be nice, thanks.
RV toilet replacement.

[travelers1999] i have had our sealand 510 out a couple of times, not sure what you are referring to, do you have the schematic? it sure helps, call sealand and they will send one to you free of charge.