Mechanical pumps are devices used to move fluids—such as water, oil, chemicals, or gases—by mechanical action, playing a critical role in plumbing, HVAC, industrial, and process systems. They operate by converting rotational or reciprocating energy from motors or engines into hydraulic energy, creating flow and pressure to transport fluids through piping systems. Common types include centrifugal pumps, which use rotating impellers for continuous flow; positive displacement pumps, such as gear, piston, or diaphragm pumps, which move fixed volumes with each cycle; and submersible pumps, designed to operate underwater. Mechanical pumps vary widely in size, capacity, and material, depending on the application—ranging from small domestic water pumps to large industrial units for cooling towers, fire suppression systems, or wastewater treatment. Efficiency, durability, and proper sizing are essential for reliable performance, energy savings, and system longevity.