If your downstem is non-removable, your h2o pipe will probably contain a sort of percolator. There are lots of percolators out there, for example showerhead percolators or honeycomb percolators, and you might have to experiment to discover the one particular you want the most effective. Aesthetically, Biohazard strikes a balance https://www.lookah.com/bongs-and-water-pipes/