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running 4000psi through a 4000psi rated hose? #4515658
09/13/17 10:05 PM
09/13/17 10:05 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
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.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman] #4515669
09/13/17 10:19 PM
09/13/17 10:19 PM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
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.


Multiple Diesel and Gasoline vehicles
Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman] #4515676
09/13/17 10:35 PM
09/13/17 10:35 PM
Joined: Oct 2007
Posts: 1,493
utah
dareo Offline
dareo  Offline
Joined: Oct 2007
Posts: 1,493
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.


2016 Golf Wagon 5MT, 2014 Accord Sport 6MT, 2016 GMC 1500 SLT 6.2
Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman] #4515683
09/13/17 10:49 PM
09/13/17 10:49 PM
Joined: Aug 2006
Posts: 9,799
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,799
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.


-Colton
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Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman] #4515684
09/13/17 10:52 PM
09/13/17 10:52 PM
Joined: Oct 2009
Posts: 3,209
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline
Joined: Oct 2009
Posts: 3,209
Wet side WA
Just sayin 300 PSI will cut you like a razor.


2004 Corolla 124705
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Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman] #4515756
09/14/17 04:32 AM
09/14/17 04:32 AM
Joined: Oct 2014
Posts: 11,827
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,827
Idaho
4,000 psi is the working pressure not the max pressure.


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: running 4000psi through a 4000psi rated hose? [Re: JohnnyJohnson] #4515770
09/14/17 05:35 AM
09/14/17 05:35 AM
Joined: Oct 2012
Posts: 4,601
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,601
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.

Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman] #4515877
09/14/17 08:05 AM
09/14/17 08:05 AM
Joined: Sep 2016
Posts: 1,418
Minnesota
bioburner Offline
bioburner  Offline
Joined: Sep 2016
Posts: 1,418
Minnesota
I highly doubt the pump will be making 4ooo for long. Most washer hoses die of other reasons as others have stated



97 Ford E350 D,99 F350 dually D
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Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman] #4515979
09/14/17 10:10 AM
09/14/17 10:10 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
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.

Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman] #4516006
09/14/17 10:38 AM
09/14/17 10:38 AM
Joined: May 2016
Posts: 717
Canada
i_hate_autofraud Offline
i_hate_autofraud  Offline
Joined: May 2016
Posts: 717
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.

Re: running 4000psi through a 4000psi rated hose? [Re: motor_oil_madman] #4516030
09/14/17 10:59 AM
09/14/17 10:59 AM
Joined: Sep 2015
Posts: 1,523
USA
mk378 Offline
mk378  Offline
Joined: Sep 2015
Posts: 1,523
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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