A percolator bong or a water pipe as it is commonly called is a type of glass bong that helps to diffuse cannabis smoke making it easier to inhale the smoke. This basic definition of what a percolator bong is doesn’t fully capture the scope of what a percolator bong is. There are different types of percolator bong but they all contain “percs” which helps to make them distinct. A perc is a small glass contraption that water passes through thereby creating a filter. A perc is usually at the base of the bong or in the tube.