Serfilco chemical pump. PVDF(KYNAR) cantilevered vertical pump, sleeved sleeve stainless shaft w/vapor seal between the shaft & support column to protect the motor, thus eliminating bearings & conventional seals. A compound impeller prevents liquid from rising in the column even at maximum TDH. The fully enclosed bottom impeller provides high hydraulic efficiency at low horsepower. An unique characteristic of all Series EH pumps is their ability to perform on continuous duty as an Automatic Level Control when an optional suction extension pipe is installed. When motor is energized, the pumps will self-prime when liquid is at impeller level. The solution will be pumped down to a maximum depth of 9ft. before losing prime but will automatically reprime when liquid reaches the impeller. The casing can be rotated for a choice of discharge direction. Discharge pipe (45-0161P), suction extension (45-0163P), suction strainer (45-0162) are available options.