So I just had a big ass Cincinnati Vacuum frame delivered and I have a question. When you turn on the vacuum and it's fully sucked everything together, do you need to keep running the vacuum pump? Or once it's fully drawn do you turn off the pump? I know there is at least 1 leak in the blanket so when I turn the vacuum off I lose pressure . . . but Im curious if the pump stays on or off on units that function perfectly.