1.The intake of the deep well pump must be above 1 m of the moving water level, and the depth of diving should not exceed 70 m below the static water level. 2.In the case of ensuring water absorption, the sneak depth is minimized.   If you want to know more about pump, please click: http://www.wbspump.com/   E-mail: diffulaustralia@qq.com WhatsApp/ Tel:: +86 16605743599