VEVOR F-E007-1F1 High Efficiency Circulator Pump, 16 GPM, 120V 20 ft Cast Iron Hot Water Recirculating Circulation Pump, 1 in Flange Connection, Check Valve, Quiet Operation, for Home Heating System

Yes, you can adjust the speed of this pump through the buttons on the display operation interface. Except for the adaptive mode, all other modes provide three adjustable speed levels, high, medium and low, which you can switch freely.

Min: ~10 W; Max: ~42 W. This pump features a 1/17 HP ECM motorVEVOR with automatic speed adjustment and night modeVEVOR. Power consumption varies automatically between ~10 W (min) and ~42 W (max) based on working conditionsVEVOR