Originally Posted by Mike3701
How do you use and santize the stone without have liquid go through the stone?
Assuming you're concerned about sanitizer or wort moving up the tube towards the regulator, a check valve will work just fine.
But if you're literally concerned about sanitizer getting into the "inside" of the stone, don't be - if anything, it's a good thing. Just give it a really short blast of oxygen when you're done to push most of it back out.