Which type of pump is known to be the simplest and least expensive?

The jet pump is recognized for its simplicity and cost-effectiveness, making it an attractive option for various applications. Jet pumps operate based on the principle of using a high-velocity jet of fluid to create a vacuum that draws in additional fluid. This design does not incorporate complex moving parts, allowing for fewer maintenance requirements and easier repairs, which contributes to its lower overall cost.

In contrast, diaphragm pumps, submersible pumps, and centrifugal pumps often involve more sophisticated designs and mechanisms that can increase both their operational complexity and their price. Each of these alternatives may have specific advantages for particular applications, but when considering simplicity and expense, the jet pump stands out as the most straightforward and economical choice.