DC Solar Water Pump 1. GS, ROHS.CE.ISO9001:2000 ... ,over-flow, overload, waterless , automatic recovery ,controlling water height as demand.2. Easy installation, maintenance-free, safe ... and pump body, copper alloy connecting base, rubber stator of high-strength and wear-resistant. 2) Water immersion ... head and must be immersed in water. NEWSKY Noiseless Screw Low Flow High Head 3SPS DC Solar Water Pump