MP Pumps Chemflo 6 Pumpak (Less Motor) All Cast 316SS housing, Seal housing and Impeller which offers more corrosion resistance, increasing service life and application flexibility. This model also protects against extreme pH and temperature. Pipe size 3" x 2", with an enclosed impeller, standard type 2100 carbon/ceramic/viton seal and viton O-rings. Flows to 450 GPM and pressures to 160 ft of head. These pumps include only the PumpPak, they do not include the electric motor.