A firefighting system is probably the most important of the building services, as its aim is to protect human life and property. Like all important systems, there must be backup pumps in case the main pump fails. There is the main pump that is electric, a backup pump that is electric, and a second backup pump that is diesel-powered, in case the electricity fails, which is common. Each of these pumps is capable of pumping the required amount of water individually - they are identical incapacity.