i under stand, what u do is u get a shut off valuve that gose on the out side water fauste. and stick that on the bottum of the bottel, and fill it up with water while the valve is closed. then stick the bowl on top live a normal garv. bong. then u drain all the water out with that valve while lighting the bowl like u would do with a water fall bong, and then u close the valve up stick the thing full of smoke into a bucket of water and put your lips on it(make sure its as far down under water as it will go.) then with lips over the top of the bottel, opean up the valves and prepare to get fucked up and maybe pass out.
partyguy420 Reviewed by partyguy420 on . Make this, youll thank me later Easy to make..works like a grav...get an outdoor garden hose attachment..the one that goes onto the pipe...its Y-shaped..has two valves.....when you take gravs you can open on valve to let in smoke..then close both valves..push the bottle into the water and then open up the valve....allows for a much more intense hit, getting you much higher....me and my buddies call it a super grav...try it out..youll like it Rating: 5