Re: purge valve?
Honestly, it's not a huge issue if you know how to manage your coal.
Purge comes in handy if you burn your tobacco and need to clear out your bottle. That's it.
People get all excited like "OMG I CAN PURGE MY HOOKAH .72 SECONDS!!!!1" but honestly it doesn't matter.
Darth Coyote, Executor of EGOB and the Black Leaf Brotherhood.