Manual Pump - A pump that does not have a float control or pressure switch to start and stop. It will require an operator to control it. Automatic Pump - A pump that has a float control or pressure switch to start and stop without an operator. A float switch is a level controller that has a buoyant, water-tight device that lies on a liquid, actuating a micro-switch when the level rises or falls, turning a pump on or off. Be sure to visit www.floodandwaterpumps.co.uk for all your needs. In order of appearance, the pumps featured are: https://floodandwaterpumps.co.uk/stre... https://floodandwaterpumps.co.uk/stre... https://floodandwaterpumps.co.uk/ama-... https://floodandwaterpumps.co.uk/app-... https://floodandwaterpumps.co.uk/app-...