Submersible light waste and sewage water submersible pumps are suitable for draining dirty water that contains soft solids. These include internal and external applications such as: Filling and emptying of containers and tanks, the drainage of flooded cellars and rainwater removal from any surface. They can also be used in septic tanks and to pump effluent from below the backwash level. They can pump fluids containing gaseous or abrasive particles. The pumped liquids can contain soft solids up to a diameter of 60 mm. Submersible grinder pumps are capable of pumping sewage in pipelines that contain faecal matter.