Bungee-Plug provides convenience for pool owners and service technicians by eliminating the need to lower water levels to close up their pool. Bungee-Plug seals the return line and isolates the pool water from the underground plumbing to eliminate risk of frozen and broken pipes. Bungee-Plug also reduces the amount of chemicals needed during winterization, so it’s better for the environment. Because it is so simple to use, it takes less time and effort to winterize a pool. Savvy homeowners could even do it themselves! The best part – it comes fully assembled – all you have to do is thread it into your return fitting and blow out the line!