Blowout Skimmer Guard
Blowout Skimmer Guards are used to plug a skimmer, and act as a combination plug & skimmer bottle to prevent damage to your skimmer caused by pool water or rain water freezing in the pool skimmer during the winter. This guard also comes with O-Rings so there is no need to wrap the threads of your Skimmer Guard with teflon tape to ensure a tight seal when threading it into your skimmer.
But the best part is the hole in top and bottom of the Skimmer Guard. This allows you to screw in the Gizzmo to the skimmer and then attach your blower or shop vac to the top, and blow out your entire system from the skimmer.