This adapter allows you to use Fly High's Pro X Series Tsunami wakeboard ballast pump with older ballast bags that use the blue perfect union waterbed adapter fitting. Fly High ballast fittings have been designed with you in mind. All of the fittings make connecting pumps and hoses to your Fly High Pro X Series Ballast Sacs™ a quick and simple task. No more struggling with old waterbed valves and water spilling inside the boat. Simply twist, pull, replace and you're ready to go! Fly High offers several different fittings that all work together to adapt to any of your needs