... (TDH) will determine if you need a positive displacement pump or centrifugal pump. In general, positive displacement pumps (diaphragm, piston, ... a correlation between distance and pressure. The greater the vertical distance is in between the water source and the ... system includesSolar panels, Battery, Mainframe box, Controller, Inverter, Pump, Pump protector, cable(18M), Wire rope Do not includeWater ...