Knapsack Pump

Aim :- study knapsack pump .

working :- Process start by pulling  and pushing hydraulic piston which produces pressure . when piston is pulled up water fills in whole piston through the hole .when piston is pushed again in the pump ball bearing locks the hole and water get stuck in it there 's a limits of pressure were pump get lock at one points so we have to open the connecting pipes which further releases water forward by force and it passed through nozzle filter works as on filter device in pump.parts :- hydraulic piston , ball bearing , rubber , vicar , connecting pipe , trigger , nozzle , filter ,  pressure producing handle .Result :- this make easy to spray any chemical . Important  of land / soil x