Originally Posted by dtwarren1942
I use the red silicon sleeves on my Vac3 and average over a year (extending six days a week) before they start to get “over stretched”). Never had one tear.I just got a Vac4.2 and tested it without the sleeve and could not maintain a vacuum. Hopefully, when I use it with a sleeve I can maintain a vacuum. If not, I guess I ordered the wrong size.
The system is not designed to be used without the sleeve.