These could serve useful as a disposable type vacuum source if one was on the move constantly.
I used to sell these things in a camping store and they really are quite handy, however i have not used one for vacuum distillation or filtration.
They come in 12V, 240V and rechargeable varieties, in australia anyhow. Obviously if one was interested, you would need to buy the inflator/deflator type, and 110v if in us!
Power leads on these rigs range from 2-6m in length and they usually come with an array of nozzle adaptors (4-5), so theres a good chance you will find one which fits nicely into your tubing.
We stocked several brands and there was a noticable difference in quality. We ran a simple test once using 2x 12V, 1x 240V and a rechargeable device, by inflating/deflating a single air mattress.
If i remember correctly, there was around 15 seconds seperating the winner from the loser in both cases.
Basically, find a reliable brand name rig becase it will last longer and provide stronger vacuum.
Ideally, you would run a liquid trap inline, as i dont think suckback would do these rigs much justice, however the vacuum may be too weak it this is done.
Experimentation is needed. I have a 12v rig in my camping box, but i recently bounced my vacuum adaptor on a concrete floor..they dont bounce too well