high pressure hoses

[jjaammeess]

can anybody tell me if there is a noticable reduction in water pressure when you increase the length of the high pressure hose to say about 50 meters  --thanks

[Octavius]

Yes, it's called Poiseuille's law

[jjaammeess]

thanks octavius ---too complicated for me but i want to keep the power unit fixed in the garage while i wander about the garden cleaning everything without the annoying wrestling match with the tap hose,electric lead and the high pressure hose. Would there be much reduction in pressure in about 50 meters from 5 meters.I need to know before i invest in expensive high pressure hose( about �3 a meter

[Octavius]

Sorry, thought you might be doing some homework!

The inside diameter of the hose determines its efficiency.

Low-priced, promotional hoses, usually 1/2" diameter, deliver 9 gal. per minute (gpm), and higher quality hoses with 5/8" diameter deliver 17 gpm. A 3/4" hose delivers 23 gpm, almost three times what a 1/2" hose delivers. The larger the inside diameter of the hose, the less pressure loss over any distance. If the pressure is low (under 40 psi), the hose is running uphill, or is extra long, then the largest size hose available should be used to minimize pressure loss in the hose line.

In your case, the water pressure fropm the tap into the hose is being boosted so the outcome at t'other end should match the input providing there are no leaks.

You can get 50m hozelock garden hoses where it achieves the same but without the pressure booster.