If you look up a post by SHORTY about subliming I2, you'll find a device that uses a household vacuum cleaner that I played with at the end of the thread, it works well with easy fine-tuning, heh but the safety comes after the fine-tuning.
I can think of devices to create small amounts of vacuum safely enough but it probably isn't worth the effort. Then again it could bee fun and rewarding?
These are the rules:
-it should give a nice increase in rate of filtration.
-no flammable vapor will ever travel down the vacuum cleaner tube.
-no liquids will ever travel down the tube.
-it can't bee a completely closed system, or atleast a completely closed system for extended periods (seconds) itll stress the vacuum cleaner motor.
I will do it myself if you don't take the glory
Maybee you can think of a device either manual or using a vacuum cleaner? And tell us about it.
Long balloons, plungers, water, tubes, plastic fittings. anything.
Why dont you think of something really out there? like what? Like a bloody tube or cyllender that sits on the roof with a turbine to create a small vacuum for whenever you need it?
Osmium does positive pressure pushing a liquid through a filter papaer stress it more than the usual negative pressure?