... per NPSH CURVE +0.5 water headProduct Features:1, Advanced Hydraulic Model: high efficiency, wide range of performance.2, Easy Installation ... period 5 Qualified parts, Low noise: the unique design of hydraulic components, good working performance, low noise.6, Vertical/Shaft Structure ... run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); RH-QDL Vertical Multi-stage Pump