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Friction Loss

The increase in pressure at the pump outlet caused by turbulence as the water flows through hose, pipes, connectors and other fittings. This results in a reduced pressure at the hose discharge point (and hence reduced flow). Friction loss is affected by flow rate, hose diameter, length and material roughness. In general, using the largest diameter and shortest length of hose possible gives the least friction loss. (See our Friction Loss Calculator)