What is a head, and why is it important? What causes cavitation, and why is it bad? If you’re looking into buying or fixing a water pump, some terms that are used can be confusing. This guide will walk you through meanings and specifications so you can make the right choices when buying, operating, and maintaining a pump.

The Parts of a Water Pump

Consumer water pumps nearly always use an impeller to move water. This is a rotating disc with vanes on it that resembles a fan.

The impeller is held inside a housing called a “volute” or “volute case.” It’s designed to direct water toward and away from the impeller. A tight fit ensures pressure can be maintained. Continue reading →