A little background first. I smoked my first joint in the 1960's, but I can"t ever recall smoking out of a water pipe, tho I"m sure I have. I recently became interested in water pipes, and picked up a low cost beaker pipe. It has the old fashion rubber gaskets and no diffusion. First time I used it was probably more about learning how to hit a water pipe as I wasn"t successful and it was super harsh on my throat and the high wasn"t anything to write about. Yesterday I took some good hits off this pipe that got me higher on weed than I can Ever remember being. Too high actually. Took me by surprise. On the third and last hit, I picked the bowl up by the bowl, and not the handle. Needless to say, it burned me and the shock and surprise led me to drop the bowl on a tile counter top breaking it into 3 pieces and losing a bunch of weed that ended up in the sink. Bummer. The bowl and stem were one piece, and if I can get a replacement, I will. Ever since I got this pipe, I"ve been looking for something a little fancier, but breaking the bowl has put a little more urgency into buying a new pipe. I"m looking at a bent neck, stemless female water pipe. Since I can"t post links, one of the pieces I"m interested in is the Thick Ass Glass Bent Neck Matrix Diffuser to give an idea of what I"d like. It is 11.5 inches tall. A little taller than I want, but I"m starting to dig the TAG glass. I"m thinking a 14mm joint would be easier to hit for this old guy vs an 18mm joint. So what are the experienced peoples opinion on 14mm vs 18mm joints? 14mm easier on the lung power? I lean towards 14mm, but no matter what I go with, it seems like a good idea to stick with the same joint size for future pipes so that bowls/slides and even an oil rig would all be interchangeable.