Originally Posted by CypherEnigma
I think the post you were referring to was saying to fill the vase higher on the stem than he did with the bell vase to make the amount of space in the vase equivalent. What you're saying is correct, if you have the water at 1" above the stem there won't be a difference in between the two vases. If you instead fill the water 1.5-2" over the stem in a jumbo(which is what I think they were saying) the pull will be more draggy.
Please note the bell he is referring to is not the bottom of the stem. And yes if you fill more water in the base the weight of the column of water that rises in the stem of the hookah will make a difference in getting a harder pull or more drag. So when he is finished taking a hit that same column rises in the stem pushing the cold smoke back through the tobacco and the first hit is heated second hand smoke mixed with fresh smoke. Now the jumbo Vase has a larger surface area at the level 1 inch above the bottom of the stem thus more water. this could also be the cause has he tried less water??