circulating energy-saving pump 45W Hmax 6m Qmax 50l / min Ø1½ 180mm + nuts Ø1 AQUATICA (774,136) Circulating pumps of this series - a kind of centrifugal circulating pump equipped with innovative electronic control system, pumps the data series are used for pumping, and may be used for circulating water in heating systems: - constant and variable flow; - Variable temperature; - with "night" mode; - controlled PWM signal (pulse width modulation), circulation pump series 774 136 has an automatic adaptive mode (the AUTO) - to start the pump, in most cases there is no need to use special modes, as the pump can auto adjust and adapt to the actual need of the system circulation, compared to traditional circulation pumps and the pump has a very low power consumption, circulation pump series meets class 774 136 ECONOMY