Abstarct: Whenever the conditions change from one steady state to another steady state, the flow unsteady between two steady-state flow occurs when the flow of current between a mortal or a quick call, baxsed on hammer the kind of temporary flow to create a pipelines It is one of the causes of sudden blackouts pump water hammer phenomenon that causes extreme changes in fluid flow and pressure pipe systems is the first time this phenomenon was studied by Streeterr. This thesis examines the effects of both series and parallel systems are discussed. To evaluate the silencing effect of water hammer in pump with two equations , the hydraulic equations ( continuity equation , momentum equation ) and the equations are facing pumps . First partial differential equations governing fluid hammer in a distribution network using the numerical solution of the characteristic lines (MOC) on routes which are called characteristic lines become the full differential equations are solved using a finite difference numerical method be. Finally, to evaluate the model results to examine the head before and after each pump and its analysis explains this effect in Gets more volatile than the series system, parallel system, because the system changes the series heads together to But the parallel system changes the whole head is fixed.