The HS/HSZ/HSD/HSR series are submersible single-phase portable pumps. The shaft-mounted agitator prevents "Air Lock" that tends to take place on vortex or semi-vortex pumps*. The rubber/resin-made stand protects the floor surface from scratching. The HSZ-series with a single float switch reduces power consumption and extends operating life. The HSD pump is equipped with a high-chromium cast iron agitator that assists smooth suction of the settled matters.The HSR pump can start pumping if there is water with its level of 5mm or more and can continue pumping the water level goes down to 1mm. Additionally, the discharge direction is selectable between vertical and inclined, which prevents folding or bending of the discharge hose.Spiral Design Anti-wicking Cable Entry Motor Protector Dual Inside Mechanical Seal Oil Lifter [Patented] V-ring (0.55kW and above) Cable Clip Rubber / Resin-made Stand Agitator (HS/HSZ/HSD) Multi-directional Hose Coupling (HSR)