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#4515658 - 09/13/17 10:05 PM running 4000psi through a 4000psi rated hose?
motor_oil_madman Online   content


Registered: 11/29/09
Posts: 4854
Loc: Houston, Texas
I noticed on my pressure washer I bought that it came with a hose rated at 4000psi working pressure. Well the pressure washer is 4000psi. Will the hose last running at max psi? They make 6000psi hoses, not sure why they didn't supply the pressure washer with one of those. Of course, they probably too cheap.
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2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4515669 - 09/13/17 10:19 PM Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
4,000 PSI is industrial and will take the skin off your foot if you are cleaning a pool. Something I discovered a few decades ago. grin

If you get a new hose, I would recommend the polyurethane.
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#4515676 - 09/13/17 10:35 PM Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman]
dareo Offline


Registered: 10/17/07
Posts: 1448
Loc: utah
People usually melt the hose on the exhaust of the washer or kink the hose. That is what makes it not last forever not running it as max rated capacity imo.
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#4515683 - 09/13/17 10:49 PM Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman]
Colt45ws Offline


Registered: 08/15/06
Posts: 9640
Loc: Central Washington
There is a safety factor in the hose. Like others said itll probably get damaged in some other way before it fails from pressure.
Plus it will only be at max pressure when using the red 0 degree tip. How often do you use that? I dont find it very useful personally and find the yellow or white tip with the wider spray pattern to be more useful.
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#4515684 - 09/13/17 10:52 PM Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2741
Loc: Wet side WA
Just sayin 300 PSI will cut you like a razor.
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#4515756 - 09/14/17 04:32 AM Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman]
CT8 Offline


Registered: 10/09/14
Posts: 10967
Loc: Idaho
4,000 psi is the working pressure not the max pressure.
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#4515770 - 09/14/17 05:35 AM Re: running 4000psi through a 4000psi rated hose? [Re: JohnnyJohnson]
Ducked Online   content


Registered: 10/25/12
Posts: 4360
Loc: Taiwan
Originally Posted By: JohnnyJohnson
Just sayin 300 PSI will cut you like a razor.


I just said it (as a scary experiment) and I seem to be OK.

IIRC there's a Taiwanese belief that staring at a crescent moon will give you nosebleeds, because of the sharpness. That doesn't work on me either.

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#4515877 - 09/14/17 08:05 AM Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman]
bioburner Offline


Registered: 09/19/16
Posts: 1418
Loc: Minnesota
I highly doubt the pump will be making 4ooo for long. Most washer hoses die of other reasons as others have stated
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#4515979 - 09/14/17 10:10 AM Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman]
motor_oil_madman Online   content


Registered: 11/29/09
Posts: 4854
Loc: Houston, Texas
Why not? You can adjust the pressure. I bought a gauge for mine
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4516006 - 09/14/17 10:38 AM Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman]
i_hate_autofraud Offline


Registered: 05/19/16
Posts: 705
Loc: Canada

I've seen 'real' 4,000 PSI and more in gases, I doubt consumer pressure washers ever
get as high as they claim - 'cause they know the average consumer can't measure the true pressure
anyway! In the fine print, 4,000 PSI is likely the max pressure at zero flow - ie, a blocked nozzle.

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#4516030 - 09/14/17 10:59 AM Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman]
mk378 Offline


Registered: 09/27/15
Posts: 1420
Loc: USA
A component rated for a certain "Working Pressure" can be pressurized to that level with a margin of safety.

It is not the same as "Test Pressure" or "Bursting Pressure". Those do not include any margin, so the application should be designed to stay below them.

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