A motor pump is a mechanical device that uses an electric motor to compress air or liquid. It is used to move fluids under pressure, such as water in a sprinkler system or hydraulic fluid in a hydraulic system.A motor pump is a mechanical device that uses an electric motor to compress air or liquid. It is used to move fluids under pressure, such as water in a sprinkler system or hydraulic fluid in a hydraulic system.A motor pump is a mechanical device that uses an electric motor to compress air or liquid. It is used to move fluids under pressure, such as water in a sprinkler system or hydraulic fluid in a hydraulic system.A motor pump is a mechanical device that uses an electric motor to compress air or liquid. It is used to move fluids under pressure, such as water in a sprinkler system or hydraulic fluid in a hydraulic system.