) Fimco 3.8 GPM High-Flo Pump is a 12 volt 3.8 GPM diaphragm pump with 45 PSI maximum pressure. Demand switch design for operation only when liquid flow is required. Pump and motor stop instantly when discharge is closed. Other features of the Fimco High-Flo Pump include: on/off switch, self priming capability, built-in cooling fan, ball bearing drive, santoprene diaphragm and viton valves. Maximum temperature of pumped liquid is 130 degrees. 11 AMP draw.