You can close those valves with a simple “hack”. The N95 woodworker mask I have has a plastic guard over the valve. Cut the guard and use an adhesive (I use S

You can close those valves with a simple “hack”. The N95 woodworker mask I have has a plastic guard over the valve. Cut the guard and use an adhesive (I use Sugru) to close the valve. Ugly but effective, and visibly shows the valve has been shut...