WILO STAR-Z glandless circulation pumps with threaded connection. Application: circulation systems of drinking water supply, for application in industries and equipment for buildings and constructions. This circulation pump is appointed only for the drinking water pumping. Product features and advantages: AC pumps with quick electrical connection, all plastic parts in contact with the pumped medium are KTW-approved, standard thermal insulation for Star-Z 15 TT. Star-Z 15 TT with integrated timer and thermostat, LCD display with symbol language, "red button" technology and automatic recognition of the boiler thermal disinfection, as well as a ball shut-off valve on the suction side and a non-return valve on the pressure side.