Question for a smartie pants

#1
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Does using higher psi use less water?

When i was using my 1800 psi pressure water to wash my car, I was amazed how little water was running down the street. When i used it to clean a woven rug, the higher psi removed a stain left that the ETM failed to remove.

And it seems we use more water with our portable unit then the TM.

Does using the Zipper SS at higher psi use less water the a wand?

Anybody have scientific data on this?

TIA
 
#4
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https://mikeysboard.com/threads/boring-flow-techie-stuff.253056

If the psi is the same the jet orifice (flow rate and number of jets) will decide water usage/flow. Assuming the same plumbing and pump capacity.

The lower psi portable will have less impact than the higher psi pressure washer but the portable can use more water than the single jet pressure washer even at a lower psi


a zipper with the same size and number of jets as the wand will use more water at higher psi up to the restriction of the hose diameter


edit: pressure washer jet chart
https://www.portlandcompressor.com/washer/pressure-nozzle-chart.aspx
 
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#5
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Fred is spot on.

I was doing t and g then being lazy I connected my hf to prespray the carpet.

A fire hydrant!

It was an empty house and I presprayed in record time.

14 hour day finished with a helper on a Sunday ffs.

10 hours yesterday with a helper as well.

Made about as much money this weekend as some poor minimum wage dude makes in a month.
 
#6
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https://mikeysboard.com/threads/boring-flow-techie-stuff.253056

If the psi is the same the jet orifice (flow rate and number of jets) will decide water usage/flow. Assuming the same plumbing and pump capacity.

The lower psi portable will have less impact than the higher psi pressure washer but the portable can use more water than the single jet pressure washer even at a lower psi


a zipper with the same size and number of jets as the wand will use more water at higher psi up to the restriction of the hose diameter


edit: pressure washer jet chart
https://www.portlandcompressor.com/washer/pressure-nozzle-chart.aspx
Thanks Fred..
So am I to understand that-- higher pressure means higher flow through each jet used-- but the higher pressure might clean better with less passes and maybe less overall water usage?-- or maybe too many variables to be definitive?
I apologize if this question makes you want to retreat to the Rubber room. :lol:
 
#7
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Thanks Fred..
So am I to understand that-- higher pressure means higher flow through each jet used-- but the higher pressure might clean better with less passes and maybe less overall water usage?-- or maybe too many variables to be definitive?
I apologize if this question makes you want to retreat to the Rubber room. :lol:
Well now you are adding the whole "less passes" thing. Yes the potential for blasting of crap from the fibers/surface (agitation) is better than a lower psi. However, the flow is what flushes the dirt from the fibers so you can potentially lose that depending on how much you reduce flow (flushing) in favor of psi (agitation)
 

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