ah i see. i taped over the carb on mine. dont use a gause, just use a loosely rolled up ball of tobacco, place it in the pipe and push it down a bit with little finger, then place weed ontop.
burn the weed as normal and then when its all burnt/just before you start to burn to tobacco you SUCK hard and shoot all it through into the water.
its called a 'shottie'
imagine mine is the green one in the pic above, ive unscrewed the first cone shaped piece and dont use it...
i highly recommend!
edit: also here we call the 'carbs' .. 'rush holes'