In-line pumps designed for conditioning, heating, water recirculation in the case of solar thermal panels (solar collectors) and for the circulation of drinkable hot water in residential building service and commercial building service. Pump body and motor support in cast iron, technopolymer impeller. Pump marked KLM and KLP are single unit pumps, Pumps marked DKLM and DKLP are twin pumps. The KLM versions have a four-pole motor, the KLP have a two-pole motors. New AISI 316 shaft and new carbon/ceramic mechanical seal for greater reliability.