A powerhead is similar to a submerged water pump. Although its functions are alike, it has certain additional features that a normal water pump lack. It can accept air with the help of a hose that goes to the surface. This gives a greater air quality. It is used to pump water at other times. The technological advancements have led to the evolution of powerheads in recent times with increased functionality. For more details visit, www.outboardclinic.com/