"Yes, I am going by what the link you posted said. Did you try to see if using the same polarity twice also might flip it? Because that is what I read the specs as saying."
Have you tried this as requested by Bob?
Confirm state of valve, ie open or closed.
Connect the black wire to negative.
Briefly touch red wire to positive and then disconnect.
Reconfirm state of valve.
Did the valve change state?
no. i have to touch red to positive and black to negative to open the valve, then i have to touch the red to negative and black to positive to close it. I only have to touch it momentarily because it is a latching valve. Using the same polarity twice does not change the state of the valve.