Which of the following is NOT a type of pump mentioned?

The correct answer is solar, as it does not represent a type of pump in the context of aquatic pest control. Pumps are mechanical devices used to move fluids, and they are classified into various types based on their operational principles and designs.

Roller pumps use rollers to propel fluid, making them effective for applications requiring continuous flow without damaging the fluid. Piston pumps utilize a piston mechanism to create pressure and are known for their ability to handle high viscosity fluids. Centrifugal pumps operate through a rotating impeller to increase the velocity of the fluid, making them widely used for moving water and other liquids efficiently.

In contrast, while solar power can be used to operate many types of pumps, referring to a "solar pump" typically means a pump that is powered by solar energy, rather than a distinct type of pump design. Thus, it does not fit within the standard classifications of pumps utilized for aquatic pest control.