Glandless circulation pump WILO TOP-S with threaded or flange connection. Preset speed stages for power regulation. All hot water heating systems, industrial recirculation systems, air conditioning units and closed refrigeration circuits. Features and advantages: can be used in heating, air conditioning / cooling systems at temperatures from -20 ° C to + 130 ° C, manual power adjustment with 2 speed steps (for pumps 1 ~ 230 V with P2≥350 W) or with 3 speed steps, pump casing with cataphoresis coating (KTL) to protect against corrosion due to condensation, easy installation thanks to combination flange PN 6 / PN 10, double-sided cable entry to the terminal box possible (from P2≥180 W) with integrated cable lug , protection class IP 44, quiet operation thanks to the use of a "wet rotor".