H20 Designs Scupper Valve includes a cap for those times you don't want or need a scupper. Letting a new person ride your ski or worrying about the scupper leaking when letting it sit has always been a worry. Well now you can cap it off as if it was never there. The cap screws on creating a water tight seal which allows you to be worry free about your scupper leaking! Have the best of both worlds.