Thanks for the feedback, I wonder if the manufactor has new screws that could possible be left unscrewed out of the valve but would still allow water not to flow out.
I'm not sure if this is the same brand, but this is what my valves look like
Thanks for responding, I'll have to check when I get home tomorrow. I wonder if they sell regular screws to replace the bleeders screw, that way the valve box won't be filled with water every time I use them.