Grundfos Inline Circulators are among the most reliable in the industry. Grundfos LM and LP in-line, single-stage centrifugal pumps feature a standard motor and mechanical shaft seals. These non-self priming pumps are fitted with identical suction and discharge ports, and are encased in spiral-shaped, cast iron pump housing. Grundfos TP Versaflo vertical in-line pumps are used in a variety of commercial heating and cooling applications. These single-stage, in-line centrifugal pumps feature standard motors and mechanical shaft seals. With their close-coupled design, the TP versaflo less sensitive to impurities in pump liquids than other canned rotor types.