Delavan FB 2 Series Diaphragm Pump 12V, 100 PSI, 7.0 GPM, Deman Pump Delavan FB2 Series 7 GPM Diaphragm Pump Demand Switch  Operates only when liquid flow is required Volts: 12 VDC Max. Flow: 7.0 GPM Pressure Shut-Off: 100 PSI