I need an opinion on hose girth...

I’d think it'd be the other way around. You're get a certain mount of water from the faucet. With a smaller hose its the same amount of water via smaller opening = more pressure. Bigger opening, same water, less pressure.

 

Smaller hose will give you higher pressure, but not necessarily more water flow.

 

resistance proportional to L/R^2.

smaller hoses and longer hoses have more resistance.

your friend is right

Edit:
You may want a beer befor you open this...
A reference site: http://hyperphysics.phy-astr.gsu.edu/Hbase/pfric.html

 

Sorry, this is wrong. smaller nozzle at the end of the hose will give highe pressure, but you want to minimize loss in the hose....

see above post

 

You opened the link, before the beer didn't you. I warned you...

 

try some Viagra to increase the girth & pressure

 

ASK LAMOUR

HES KNOWS ABOUT FINDING GURTH AND HE LIKES LONG HOSES.....

 

ASK LAMOUR

HES KNOWS ABOUT FINDING GURTH AND HE LIKES LONG HOSES.....

 

ball licker

 

back to the question ........ i can tell you this - im lucky enough to have a 2 inch diameter fire hose but if the opening on the head of the nozzle is the same as the one on the kiddy size hose, the force of water spewing would be the same. when i use my fire hose the same amount of liquid shoots out but has a much larger build up of pressure. when the pressure builds in my hose its like an eruption of mount st helens. my wife can handle the fire hose, she s got bolt ons.

 

The flow rate from both hoses wil be the same (determined by maximum flowrate from the valve). Flow rate = velocity X cross sectional area of the hose. So in the smaller hose, the velocity of the water will be higher. However, your friend is right, generally larger pipes or hoses do have more pressure (its somewhat counterintuitive because of the difference in velocity). I would think a smaller hose would be more effective because the higher velocity of the water will be more effective at knocking the dirt off the car. Somewhat of a half-assed explanation, hope it helps.

 

Jeff has it partly correct.
Velocity, pressure, and volume are 3 different things.

 

Sorry. he only has it partially correct. when washing a car you only care about pressure at the hose nozzle. to get must pressure there, must reduce loss in the hose, therefore you want a shorter hose of larger diameter...

see my post above for link to equations if your so inclined...

 

Fixed!

 

Opinion on girth?

 

three day ban!!!!!!

 

WHY?

 

oh I think you know..

 

I didn't read the whole thread, I apologize.

 

I always assumed that a narrower hose would increase pressure, but then I got one of those coil hoses and it sucks. I guess there's a reason garden hoses are the size they are. Way to go Stephanie.