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I have a one BHP water pump, the water pressure of a coiled hose connected to the water pump output side was not that great. Would an unwound water hose produce greater water pressure? [Friction Losses?]

Thanks, Alan

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Hi Alan. I hope you now have sufficient reputation to be able to comment . If you are satisfied with the answer you are supposed to accept it by checking it. –  anna v Feb 8 '12 at 6:19
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Yes, but under normal circumstances (e.g. garden hose scale) you wouldn't notice.

Friction losses are higher in bends, especially sharp bends, but the coils in a regular hose aren't very sharp. This is by design: hoses are made fairly sturdy so you don't get unintentional sharp bends. So it's really down to engineering more than physics.

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@AlaN Jones tried to comment :"I did unwind the hose, found pressure increase. Thanks for your answer" . There was some mixup with the account. –  anna v Feb 8 '12 at 6:15
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