The compact and economical SHURflo Low Flow DC Surface Pump can be used for general purpose water delivery, or will dispense on demand using the built-in 60 PSI pressure demand switch. Self-priming up to 8 feet (subtract 1 foot for every 1000 foot altitude), and will run dry without damage. Designed for 12 VDC operation, this pump is perfect for off-grid PV-direct water pumping.