The QDX series pump head adopts anti-rust treatment castings and electrophoresis which make more durable .The centrifugal impeller and vortex structure make the pump higher head. The double-layer mechanical seal and "O" ring oil-proof washer assure the quality of the sealing. Because of the small volume and light weight, it's suitable for use at home, home water supply, drawing water from well in the countryside,garden and farm irrigation.