①Pump complies with the water supply law in Japan as wetted surface is made by stainless steel.②Optimized hydraulic design saves energy consumption.③Installation space is minimized and pump runs with low noise as the pump is submerged.④Water contamination is prevented by use of a water-tight type motor.⑤Pump permits to drain close to bottom of the pit as suction inlet designs lower portion.⑥Pump is allowed to install at the underground pit due to light-weight. Optional horizontal installation model is available for below 65 mm discharge model.