The Original "Johnny Hat"

The weatherproof, no maintenance solution to make your portable restroom experience enjoyable; yes, it can be enjoyable. The Johnny hat is a sealed solar powered ventilation fan that fits on all standard production portable restrooms. It has been designed to fit over your 3'' stacks, and into your 4'' stacks. No tools required! Simply remove it from the box, set it on or in the vent and let the Johnny Hat and the Sun do the dirty work!
 
Patent Pending
 
*Each Johnny Hat comes with a self tapping screw which can be used to secure the exhaust vent onto the holding tank stack to prevent theft.