How to repair a Mansfield toilet step 7

So I reach down and grab the valve seal, I don't just pull it up, I pull it out to the side, removing it from the grove, then I pull it up and remove it, then I make sure I did not leave any part of it in the grove. Note: mast of the time the Mansfield valve seat is red or pink, it can also be black.

NEXT

Remove Mansfield disk