I could barely look at that website.... horrible design hurt my eyes trying to navigate there Gas instead of water though?......
#1 that seems like a step backwards..... using Gas for HHO. Sure, it has some Hydrogen there, quite a bit from what I've read. "C6H14" But its still.... kind of a step back in my opinion
#2 If your HHO water system backfires, and somehow goes back past your bubblers and flame arrestors..... all you have is a blown system that will have to be rebuilt.
But imagine that going back to a nice big canister of Gasoline instead of water!!