Pressure cleaners work solely off the water pressure coming from the pump. These cleaners clean your pool by pushing water to the pressure cleaner. It does this by propelling it along the floor of the pool and sometimes even up the sides of the wall. Debris is forced up into a catch bag or net by the Venturi effect created by the pressured water. There is also a tail on the pressure cleaners which sweeps along the pool floor, scrubbing it and moving the debris along to the main drain where it can get sucked up by the regular filtration process. These cleaners are amazingly effective in their ability to clean your pool resulting in a radiant shine. These cleaners also prolong the life of your filter as the dirt and debris is being collected in a bag and not through the filter of your pool. Larger debris rarely gets stuck in these cleaners. If you are needing a replacement part for your pressure cleaner, look no further!