Here's a number of of adapters that you use to inflate and deflate pool toys, innertubes, air mattresses, etc. I've also included a tube to store all of the adapters to keep them from breaking.
See https://www.youtube.com/watch?v=4F4HCUOhkZg for a quick demo
I use a battery powered vacuum cleaner to inflate/ deflate my float toys.
Boat_Vacuum_Adapter.stl | 851.7KB | |
Small_Inflator.stl | 467.5KB | |
Tube_Body.stl | 199.4KB | |
Tube_Cap.stl | 289.6KB | |
Twin_Mattress_Adapter.stl | 626.4KB |