Sealing of the Sight Tube when High Pressure Flush of the Nipple Watering Lines.
Enables cleaning the Sight Tube with a brush. (Optional from Plasson).
Assures the decrease of bacteria and contamination in the Sight Tube units.
Avoids leaks if pressure creeps up.
Avoids the Float Ball from sticking to the top of the Sight Tube when flushing.
Material PP resistant to Chemicals and vaccine components.