Pumps that are manufactured today are made in an infinite variety of types, sizes, and shapes.The major classifications of pumps are reciprocating, rotary, and centrifugal. Fig. 1 showsone breakdown of different types of centrifugal pumps listed under the Kinetic family tree.The types of pumps that are most commonly specified in the Heating and Air Conditioning fieldare the end suction and split case units. In general, pumps handle an extreme variety ofliquids and in many different applications. As such, they are often subjected to all kindsof mishandling and abuse and are often mistakenly blamed for many different application problemsfound in the field. Therefore, in order to have better control and knowledge of hisproduct, the pump manufacturer of today invests in adequate lab facilities for thorough testing.