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Two main reasons for reduction in pressure in a hose
• friction loss
• effects of gravity when working above a water source or pump
4 factors affecting Pressure Loss
• internal diameter of hose
• output flow of water
• heights in metres above or below the water source
• length of hoseline
5 ways frictional loss affects pressure
• the length of hose through which the water flows
• the longer the hoselines, the greater the frictional loss
• square of the flow rate
• if the flow rate is doubled through a hose, the pressure loss is increased by 4 factor
• hose diameter
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