Pressure will stay the same regardless of length, but flow rate will be reduced by a significant amount, reducing the effectiveness of the washer. Stay with a hose length that's as short as you can live with if you want to maximize the performance of your pressure washer, especially if it has a lower gpm rating.
Hose length is not a pressure problem its a flow rate problem. So when you replace or extend your pressure washer hose for a longer one you must increase the internal diameter of the hose to maintain the gallons per minute of your machines pump rating. Gpm is a more critical factor in a pressure washers cleaning ability than psi.
Thanks for your comment. So, I replaced the 1/4” factory hose on my electric 2000 psi Kawasaki pressure washer with with 100’ of 1/4 inch hose. The psi will be the same but the gps won’t and it’s a 1/4” hose but just longer?
Dude, you're a dad too? That's awesome. Man, so much more respect knowing that. I'm a father of two and you help me unwind and get caught up on the detail world. Thanks for all the hard work you do, Josh. So much pressure having kids in the mix and all the effort you do for us, doesn't go unnoticed.
Added length & diameter has a very small affect on the pressure rating (psi) on small units as this is determined more by the nozzle size/orifice and the control valve more commonly found on larger fuel powered pressure washing units. The pressure drop has to take the flow rate (gpm) into consideration, for example a tipical psi drop on 3gpm mashine running 100f (only 30m) of 1/4 hose is only a tiny 4psi but the same 3gpm machine running 100f of 3/8 hose would have closer to 50psi drop. This is hardly noticed & dosnt sound like a lot but on larger equipment running very long lenghs 250m+ this has a very noticeable drop in psi if the correct size hose is not fitted you can be looking at 100s if not 1000+psi drop. For small electric units 2/3gpm I'd recommend sticking to 1/4 over no more than 80m & you will get 1800psi all day just use the correct fan tips. However the length & diameter does have a large affect on the flow rate (gpm/lpm) on pressure washers over distance. To large a hose on a small unit you will find a big flow drop over a distance and too small a hose on a large unit you would be causing alot of back pressure on the machine that will cause damage. i.e. on a small electric unit you couldn't run 200m of 1/2 hose as you dont have the power and on a large comercal 16gpm+ machine you couldn't run 1/4 without causing great damage due to the back pressure on the machine. Hope this helps 🙂
Since you seem to know what your talking about, if i have a 3500psi honda gas unit and want to put 100 foot hose on it, what diameter would you recommend. Thanks for your input and info.
@@brianb5779 that's what I'm here looking for. I need to know a little more about the gpm vs dia and length of hose. I need to retain as much gpm as I can get with my 3100psi at 2.5 gpm. I want to get a 50ft hose for it, but not sure if there would be any drop in gpm if I step up to a 3/8" from 1/4".
Don’t expect much difference in pressure - as long as you have a small aperature on the nozzle. However - liters/minute will be greatly affected. On a 1/2” hose I get 10L /min from my garden pump - with a 3/4” hose, I get up to 75 l/min.
Adding my data-point to this. Tested with Active VE52 pressure washer, 4.0 orifice 40° nozzle, Uberflex 1/4"x50' and Flexzilla 3/8"x50' Numbers between both hoses were nearly identical, low psi due to orifice size. Uberflex 1/4"x50': 850psi, 1.9gpm Flexzilla 3/8"x50': 850psi, 1.9gpm I would definitely recommend the 1/4 over the 3/8 hose for anyone running under 3000psi. The larger Flexzilla hose is much bulkier and tends to crimp, it also does not roll out as easily. I have a 3/8" KobraJet hose too and it is nice but very bulky. The 1/4" Uberflex is great it doesn't tangle as easily and is incredibly pliable for a pressure washer hose.
@@tommytfaa Hi Tom, I've got one of the SGS guns on the end. Don't worry to much about that unless you want a shorter gun. Most of this stuff is just marketing fluff. You'll like the 1/4 hose much more than the 3/8.
This, 100%. 3/8 is a pain in the rear to deal with compared with 1/4. 3/8 isn't needed for these little electric pressure washers, the psi and gpm are way too low for hose width to make a difference. The pump will make up for the tiny difference, and you'll get the same results, just like you mentioned. 1/4 all day for electrics.
Careful with that pressure drop. Pressure drop is related to the flow rate. The electric pumps have such a low flow rate that you won`t have any real drop, even in a 1/4" line. When you get into the high flow gas powered pumps with 5 gallons or higher, then the pressure drop can become significant.
Have you ever tested or plan on testing the Yamatic 50ft Pressure washer hose? It's the #1 best seller on Amazon and can't find a good video that's well put together like yours. They don't test much.
Interesting, I'd definitely think they're would've been some pressure loss, but now I think the friction loss would effect the flow more than the pressure. It would be interesting if you tested that too
Hi Josh. Yeah, great test. As an aside, I’m a firefighter pump apparatus operator. Parasitic loss in hoses is primarily a function of hose diameter and pressure . Given the very low flow rates associated with these small pressure washers, it would take a very very long hose to introduce a loss. You would probably notice a loss more quickly by testing with a large orifice, ( higher flow being more likely to induce turbulence within the hose). But as a super long hose would be as difficult to work with as a short one, I think you nicely covered the sweet spot and dispelled the pressure loss myth. Thanks for your hard work. New to the detailing party, and your videos are very helpful for what can only be described as a very steep learning curve
Hello Bob, thank you for the information. Is there a place where I can calculate this using pressure machine pressure and gpm values. I use a 70 foot hose. I can easily feel the pressure drop. Would it be better if I used a hose with a wider inner diameter ?
@@brsokcu ok- here’s your formula for flow rate. Sorry, I had a very long day yesterday and forgot till today. So you take the constant 29.7 times the diameter squared of your orifice times the square root of your pressure. That will give you flow rate. As you can see, your orifice is greatly smaller than the inside diameter of your hose. This will be your first limiting factor. This whole pressure washer hose length thing is almost moot for these low flow, relatively low pressure machines. Unless your hose is damaged or separating internally, you would have a very unwieldy setup before friction(pressure loss) should be a factor. One more thing. To check for a hose problem, put a pressure gauge at the machine, and one at the wand. With a good hose there should be no appreciable difference Regards, Bob H
"It's gonna be a long walk with this 100 footer", approximately 100' walk. Good info though, I've wondered about pressure drop/foot as well as matching a pressure washer to a hose diameter
I would be interested to see the same test repeated with a gas pressure because I definitely noticed a pressure drop going from a 5/16 hose down to a 1/4 inch 100ft hose (purchased 1/4inch on accident) 4,200 PSI 3.5GPM machine by almost 1,000 psi.
Really appreciate that you showed the problems with using a short hose in a driveway around a vehicle. It appears that length doesn't affect pressure as much as it affects ability and ease of use. Now I can make better choices when considering what I need as an occasional user of my cheap, Portland power washer. Cheers
Thats crazy working with hydraulics smaller hose more pressure less volume. Bigger hose more volume less pressure. I figured the same here, but proved wrong. Nice vid bro.
Great video Josh, like Jon said I was just using mine with a 50 foot hose actually two 25s together and was wondering if I was losing pressure also, well you answered my question. Perfect timing on the video. Have a great day and Father's Day also.
UPDATE:1 year and still cranks within the first 2-3 pulls. Probably will buy another when this one finally does bite the dust ruclips.net/user/postUgkx43QMbQqu67IZadu9ou8Sg1BdrunMRNqX . No issues at all. Very happy with it.UPDATE: After 6 months of use and over 70 uses I would still highly recommend this pressure washer. It does vibrate a decent amount but never had it “walk” like others have mentioned. No oil leaks, still seems to run like the day I bought it. Still cranks within 2-3 pulls every time. Very happy with my purchase!Have used it about a dozen times now. Plenty of power, cranks up on 1-2 pulls every time. My only complaint would be I wish it was a little taller to make it easier to walk with it (hits my ankles a lot) and that the two hose connections were a little further apart but it hasn’t caused me any issues. Seems to run a good 1-1/2-2 hrs on a full tank, overall a well built machine and definitely worth the money in my opinion.
Omg, love you for doing this test! I’m new to this and I was having a hard time as factory hose was 15mm and the Uber flex is 14. So I was going nuts trying to figure out a setup. Now I’m confident in buying a 15 to 14 mm. Love your work, thank you!!!
Purchased the Uber flex after your no kink video, it kinked on the very first use! So bummed. It kinked so fast and so easy. I think I’ll go back to the flexzilla
I was a painting contractor for nearly 40 years and every exterior house or building I painted we pressure washed. I own 3 Graco pressure washers and we ran 150 3/8 hose and there is 0 pressure drop at that length. I'm not sure that running 100 or greater with an electric pressure washer won't cause it to wear prematurely.
It would be interesting to see measurements taken at all points. Current meter on the AC. Flow meter on the supply hose. Pressure gauge also directly at the output. And a timer on how long it takes to reach full pressure. But thanks for putting some effort into making objective comparisons in your videos. Curious on your thoughts of converting psi and gpm to Cleaning Units when comparing pressure washers, tips, etc. Would that allow a more fair comparison? Of course psi or gpm separately might be more important to some. Currently shopping the on sale Greenworks Pro 3000 & 2300. Surprisingly, there isn’t a big difference between the two using your data from your other videos and converting to CU. Could be argued the 2300 actually performed better.
Why does my total stop system stop working after I change out the stock hose and wand that the pressure washer came with for my new Uber flex hose and McKillans wand (I have Sun Joe SPX2688-Max electric)
Once you get the pressure up you should always have the same pressure unless you change the tip. You have a volume problem though because the presure washer isn't designed to run that long of hose. Basically your gallon per minute is was down on s washer that size.
Thanks for the video, I wouldn’t have thought it would have the same pressure. Can’t wait for the craftsman 2400, I bought one and love it other than waiting on a replacement want since mine is leaking. Also bought the craftsman foam cannon and it works fine for me.
100' 3/8" .. I'm looking at the gas Simpson 3200 PSI at 2.5 GPM, but I'm using it to clean around the house .. surface cleaner for the driveway, pool cage, etc. My old electric 2000 PSI at 1.2 GPM .. was taking forever.
Anybody have any idea why I would be losing pressure? I purchased the 30’ uberflex hose for my sunjoe. No leaks anywhere. Immediate loss in pressure from my factory hose. The unit sounds funny too. The Motor stays on longer when I power the unit on and it also runs longer when I release the trigger
Awesome, thank you! This unanswered question kept me from ever considering a 100ft hose. Think I'm good with a 50ft. An extra 25ft would be nice sometimes though, and I have an extra 25ft uberflex. Just need that adapter to hook them up! 🤙
I just bought the Greenworks 3000 PSI Electric, & it came with a 25 feet soft flex hose. And at my house I only have outside water faucets in the back of my house, & the idea of lugging the garden hose, electrical cable, the pressure washer, & its 25 foot hose to the front and across the lawn doesn't sound like fun to me. So I'm getting an added 25 or 50 feet, it will still not cover all of where I'd need it, but those few times I need more I can wheel the washer, garden hose, power cord down my driveway & be able to just leave it in the driveway & not need to cross over the lawn. I just an image of finding unseen dog poop that was left in the grass by one of my lovely neighbor's pets, & me when done & winding up the hoses, & cord using my arm to wrap them around, & then smelling something bad to late. btw, anyone walking a dog at night in a town where it isn't lit up like a big city should get an automatic ticket if they do not have a working flashlight with them, having dog poop bags is a given, & if not, two tickets.
Very impressive i actually bought the craftsman pressure washer but I bought the 50 ft flexilla hose it has been working very well thanks for your recommendations
I think as long as the hose will support the GPM being pushed you will not see a drop in PSI. Because most electrical units don't push much GPM its hard to exceed the limit of the hose. With a larger gas unit you would see a drop in pressure once the GPM capacity is reached from the resistance of the added length.
I wonder if there will be a loss of pressure if the cheap hose are kinked in multiple locations and then pulled straight. I thought my Ryobi electric pressure washer was going out soon as I could feel the pressure weakening, but changing to a 30' Uberflex hose made the pressure washer feel like new again.
Thanks for the video, Josh! Great information as it's difficult to find this test anywhere else other than what some people have said on various forums about pressure loss with 100+ ft of hose. I am curious if the flow rate (GPM) increases at all with a 3/8" hose versus a standard 1/4" hose with an electric pressure washer. I understand that a larger hose diameter would put more strain on the electric pump intended for use with 1/4" hoses. Thanks again, and keep making great videos like this!
great video, any chance you checked before or after the video the amperage at each configuration setup, would be interesting to know the increase in amperage at 100ft and 150ft viz-z-viz at 50ft!!! As the pressure increases to 1800PSI in each setup ... greater the hose length, greater the work the pressure washer needs to do till it reaches 1800PSI so I feel there will be definite spike in amperage, better to stay within the rated amperage of your OE washer
Always good to upgrade the hose and gun, but buy a gas-powered PW unit to increase GPM to up to\ around 2.5 and use a more controllable 40* tip. Then you have a versatile tool that can do some actual work. None of the electric units are worth buying.
Wow that pretty much solves the myth of variation of hose length vs PSI. Great video Josh. Even though this is a video for pressure washer PSI, I can imagine that the fire department would appreciate your video demonstration. I'm sure this test applies to their fire hoses length. Very educational video. 👍👍
That's more different again. Their hose lengths work off the diameter and flow rate pressure of mains water. If you can closely match flow rate and then purge the air from the hose, it's almost the same as being rigged straight into a hydrant. However the engines are adjustable to correct for that and can even 'pull' the water from the hydrant as opposed to being fed the water. This applies less to fire department for this reason.
@@AlexYeets Whole textbooks have been written on fire department hydraulics along with pump theory. It was fun learning a bit of it. Kinda cool when you do the calcs in your head and the water comes out at the end at the proper volume. Longer hose is always going to need more pressure to meet the volume intended at the nozzle.
This is true. But we calculate the friction loss of each size of hose and length plus the nozzle pressure. Lots of math involved but very easy to calculate in a hurry.
@Steve Marquez longer hose smaller diameter needs more pressure. Larger diameter hose doesn't require as much pressure. And we normally don't pump over 200psi
Hi Bailey It seemed that way to me as well, but its the orifice of the nozzle that effects the flow since thats the last point the water passes through
Would it have the same water volume with (2) 50 foot 1/4" hoses at 100' with say a sprayer tip for a 3200 psi 3.5 gal washer? I don't see why it wouldn't unless the 1/4 inch hose without a wand on it would still reduce the water volume somehow? I think I will try that out!
I paused this at 2:40 & I'd bet next to nothing in pressure loss, If you think of the inner diameter of the hose x 100 feet, it is next to nothing. Damn I am an idiot. Why would there be ANY loss when dealing when fluids? Hydrodynamics will not allow there to be any loss without the washer blowing a seal, or the hose bursting, if you read Stephen King's The Eyes of the Dragon, you'd know if you wanted to have a rope, or a chain or in this case a hose fail, just keep making it longer, eventually you will find a flaw, & longer it is increases the chance of a flaw to develop over time. (btw, good book, it's set in the middle ages & has Randall Flagg as the antagonist, written for teens, but I've enjoyed everything that had King's Flagg in it)
glad i came across your channel, and this video i bought a greenworks 1500 electric and wanna put a longer hose on thanks for confirming no pressure loss and a new subriber
Hope you can do a video of your best garden hose for detailing! I have the uberflex 30ft red color pressure hose now looking for a garden hose under 50ft since I bought one that's 100ft and it's a big mess to move around, too much hose for me
Hoping you can answer my question. I am new to home pressure washing, but I would like to hook up 2 - 50 foot uberflex to my WHOLESUN 3000PSI Electric Pressure Washer. Can I? What parts do I need? Thank you for your interesting reviews.
Hey Josh. A bit off topic but I can’t for the life of me find any information on what ‘Area Performance’ means. My karcher K5 compact is 40 m2/h. Does this mean it’s only capable of doing 40 m2 before I need to let the washer cool down? Sorry if this is a dumb question I’m genuinely not able to find information on what m2/h means online.
Josh, Do you happen to have a link to a quick connect attachment that can be used to connect 2 hoses in a situation like this that already have quick connects without taking all the fitting on and off? Not the coupler you used but something where you can keep your quick connect fittings in place? i've looked and I can't find it. Thanks.
I bought the uberflex you suggested and it doesn't work with my electric pressure washer. I'm pretty sure it has a smaller ID than what came with the PW and it makes my PW leak when connected. Also because of the smaller ID when using the gun it sprays a mist instead of a high flow stream
Great video topic! What size orifice would you recommend for an 1800 psi Ryobi for just spraying water on car with a 25 and 40 degree nozzle? Not a foam cannon. Thanks!
I have a karcher HD professional pressure washer have you any idea what I need to use the quick connect as the M22 14mm fits but will not tighten up almost like karcher did something to stop you using none genuine hoses ???
Hi Josh. Nice video. Something I can show my engineering students. FYI: Pressure = Force/Area. Therefore you scan only change the pressure by changing the force of the area. This means the Inside Diameter of all your hoses is the same as the pressure is not changing. Lloyd
@@moxee33 the Area is the cross sectional area of the hose. If the inside diameter (the hole) of the hose is 10mm then it has an Cross sectional Area of about 78 square mm. This is constant along its entire length. As this doesn’t change and the Force applied by the system doesn’t change, the Pressure can’t change. Lloyd
I just order the Yamatic superflex 75’ 1/4 hose for a retractable 50’ reel. I’ll let you know how is it. The store said it will fit w no trouble. Or you have any other suggestion?
I noticed that when you test the 100', it re-pressurizes slower than the 50 ft test. Is there a way to avoid this? Is this harmful to the pressure washer?
It seems like it’s working the pressure washer more… I’m not sure if that will effect it long term but it seems like it would wear it out faster. I recommend getting two of the 50’ and linking them when you need the extra length, but most of the time just use the 1 50’
I think 50' is the gold spot. If you're using stuff like snow foam cannons or anything like that, it will be irritating to wait for it to charge to full pressure, so I think that is where I will stay. If you're using the machine for things like drive pressure washing or signage cleaning or massive hgvs where you're spending a long time with that trigger pulled anyway, then the extra length is certainly needed and the charge time is more tenable
So my stubby gun has a m22 14mm fitting but my Sunjoe has a 15mm connection..I'm not sure what I need to use that stubby gun I bought but does anyone have any suggestions please?
i tried using the pressure gauge on my Ryobi 2300 psi electric pressure washer but does not work, im returning the pressure gauge because they are not made for electric pressure washers!
How much did the harbor freight pressure washer get psi on that machine, also what pressure washer has the highest psi u have ever seen so far, only need one with high psi for sidewalks an decks only, so want a higher psi under $500.00
solid vid...hey man any chance youll be getting your hands on the new big mouth foam cannon from chemical guys for review? thinking about getting it but no videos on it except for their own so i cant take that as a genuine review hahaha
I have their torq and honestly the sunjoe $20 cannon from Walmart is just as good. Added a 1.1mm orifice and the foam is very thick. Ppl seem to love the mtm hydro but it’s $80.
Hi Josh one of my apts has ro hot water as a water supply what pressure hose do u recommend I need 50ft minimum. As my setup is only using a 6 foot input to my Kranzle?
Pressure will stay the same regardless of length, but flow rate will be reduced by a significant amount, reducing the effectiveness of the washer. Stay with a hose length that's as short as you can live with if you want to maximize the performance of your pressure washer, especially if it has a lower gpm rating.
I totally agree. GPM is where you will see the difference
It's the inlet valve diameter, it's tiny as fuck
Hose length is not a pressure problem its a flow rate problem. So when you replace or extend your pressure washer hose for a longer one you must increase the internal diameter of the hose to maintain the gallons per minute of your machines pump rating. Gpm is a more critical factor in a pressure washers cleaning ability than psi.
this
So if you go to a 50 ft or 100ft hose you should go with a 3/8 id.
Thanks for your comment. So, I replaced the 1/4” factory hose on my electric 2000 psi Kawasaki pressure washer with with 100’ of 1/4 inch hose. The psi will be the same but the gps won’t and it’s a 1/4” hose but just longer?
Will low GPM cause your Water pump to loose pressure when holding the trigger?
It's not the hose, it's the inlet valve on electric pressure washers.. they're tiny
Finally a RUclipsr who shows the actual length of 25ft 50ft and 100ft…Great video!!
Dude, you're a dad too? That's awesome. Man, so much more respect knowing that. I'm a father of two and you help me unwind and get caught up on the detail world. Thanks for all the hard work you do, Josh. So much pressure having kids in the mix and all the effort you do for us, doesn't go unnoticed.
Added length & diameter has a very small affect on the pressure rating (psi) on small units as this is determined more by the nozzle size/orifice and the control valve more commonly found on larger fuel powered pressure washing units.
The pressure drop has to take the flow rate (gpm) into consideration, for example a tipical psi drop on 3gpm mashine running 100f (only 30m) of 1/4 hose is only a tiny 4psi but the same 3gpm machine running 100f of 3/8 hose would have closer to 50psi drop.
This is hardly noticed & dosnt sound like a lot but on larger equipment running very long lenghs 250m+ this has a very noticeable drop in psi if the correct size hose is not fitted you can be looking at 100s if not 1000+psi drop. For small electric units 2/3gpm I'd recommend sticking to 1/4 over no more than 80m & you will get 1800psi all day just use the correct fan tips.
However the length & diameter does have a large affect on the flow rate (gpm/lpm) on pressure washers over distance. To large a hose on a small unit you will find a big flow drop over a distance and too small a hose on a large unit you would be causing alot of back pressure on the machine that will cause damage. i.e. on a small electric unit you couldn't run 200m of 1/2 hose as you dont have the power and on a large comercal 16gpm+ machine you couldn't run 1/4 without causing great damage due to the back pressure on the machine.
Hope this helps 🙂
Since you seem to know what your talking about, if i have a 3500psi honda gas unit and want to put 100 foot hose on it, what diameter would you recommend. Thanks for your input and info.
@@brianb5779 that's what I'm here looking for. I need to know a little more about the gpm vs dia and length of hose. I need to retain as much gpm as I can get with my 3100psi at 2.5 gpm. I want to get a 50ft hose for it, but not sure if there would be any drop in gpm if I step up to a 3/8" from 1/4".
Don’t expect much difference in pressure - as long as you have a small aperature on the nozzle. However - liters/minute will be greatly affected. On a 1/2” hose I get 10L /min from my garden pump - with a 3/4” hose, I get up to 75 l/min.
Adding my data-point to this. Tested with Active VE52 pressure washer,
4.0 orifice 40° nozzle, Uberflex 1/4"x50' and Flexzilla 3/8"x50'
Numbers between both hoses were nearly identical, low psi due to orifice size.
Uberflex 1/4"x50': 850psi, 1.9gpm
Flexzilla 3/8"x50': 850psi, 1.9gpm
I would definitely recommend the 1/4 over the 3/8 hose for anyone running under 3000psi. The larger Flexzilla hose is much bulkier and tends to crimp, it also does not roll out as easily. I have a 3/8" KobraJet hose too and it is nice but very bulky. The 1/4" Uberflex is great it doesn't tangle as easily and is incredibly pliable for a pressure washer hose.
Your reply answered every one of my quetions, thanks!
I just bought the 52. I was going to do the obsessed garage thing and get 3/8 but I will go your route. Did you upgrade the wand? What are you using?
@@tommytfaa Hi Tom, I've got one of the SGS guns on the end. Don't worry to much about that unless you want a shorter gun. Most of this stuff is just marketing fluff. You'll like the 1/4 hose much more than the 3/8.
This, 100%. 3/8 is a pain in the rear to deal with compared with 1/4. 3/8 isn't needed for these little electric pressure washers, the psi and gpm are way too low for hose width to make a difference. The pump will make up for the tiny difference, and you'll get the same results, just like you mentioned. 1/4 all day for electrics.
Careful with that pressure drop. Pressure drop is related to the flow rate. The electric pumps have such a low flow rate that you won`t have any real drop, even in a 1/4" line. When you get into the high flow gas powered pumps with 5 gallons or higher, then the pressure drop can become significant.
He's got money to replace that pressure washer. Take this as him doing it for science and for us
Have you ever tested or plan on testing the Yamatic 50ft Pressure washer hose? It's the #1 best seller on Amazon and can't find a good video that's well put together like yours. They don't test much.
I have 3 of them. Awesome hoses for the money. Super flexible(green one)
Interesting, I'd definitely think they're would've been some pressure loss, but now I think the friction loss would effect the flow more than the pressure. It would be interesting if you tested that too
Hi Josh. Yeah, great test. As an aside, I’m a firefighter pump apparatus operator. Parasitic loss in hoses is primarily a function of hose diameter and pressure . Given the very low flow rates associated with these small pressure washers, it would take a very very long hose to introduce a loss. You would probably notice a loss more quickly by testing with a large orifice, ( higher flow being more likely to induce turbulence within the hose). But as a super long hose would be as difficult to work with as a short one, I think you nicely covered the sweet spot and dispelled the pressure loss myth. Thanks for your hard work. New to the detailing party, and your videos are very helpful for what can only be described as a very steep learning curve
Hello Bob, thank you for the information. Is there a place where I can calculate this using pressure machine pressure and gpm values. I use a 70 foot hose. I can easily feel the pressure drop. Would it be better if I used a hose with a wider inner diameter ?
@@brsokcu There is. I will find the formula and post it in a comment when I get home this evening
@@bobhawkins3387 thanks brother appreciate it 🙌
@@brsokcu ok- here’s your formula for flow rate. Sorry, I had a very long day yesterday and forgot till today. So you take the constant 29.7 times the diameter squared of your orifice times the square root of your pressure. That will give you flow rate. As you can see, your orifice is greatly smaller than the inside diameter of your hose. This will be your first limiting factor. This whole pressure washer hose length thing is almost moot for these low flow, relatively low pressure machines. Unless your hose is damaged or separating internally, you would have a very unwieldy setup before friction(pressure loss) should be a factor.
One more thing. To check for a hose problem, put a pressure gauge at the machine, and one at the wand. With a good hose there should be no appreciable difference
Regards, Bob H
"It's gonna be a long walk with this 100 footer", approximately 100' walk. Good info though, I've wondered about pressure drop/foot as well as matching a pressure washer to a hose diameter
Haha I like to add a little drama to it
I would be interested to see the same test repeated with a gas pressure because I definitely noticed a pressure drop going from a 5/16 hose down to a 1/4 inch 100ft hose (purchased 1/4inch on accident) 4,200 PSI 3.5GPM machine by almost 1,000 psi.
Really appreciate that you showed the problems with using a short hose in a driveway around a vehicle. It appears that length doesn't affect pressure as much as it affects ability and ease of use. Now I can make better choices when considering what I need as an occasional user of my cheap, Portland power washer. Cheers
Cut to the chase… 20:45 great info! Thanks
I ask this question for very long time and finally i have the answers. Thank you for this video. You got an additional subscriber.
2nd👍👌
Part of being a dad. Happy Father's Day Josh and drink lots of natural lemon or orange juice. Get well soon!
Thats crazy working with hydraulics smaller hose more pressure less volume. Bigger hose more volume less pressure. I figured the same here, but proved wrong. Nice vid bro.
Great video Josh, like Jon said I was just using mine with a 50 foot hose actually two 25s together and was wondering if I was losing pressure also, well you answered my question. Perfect timing on the video. Have a great day and Father's Day also.
UPDATE:1 year and still cranks within the first 2-3 pulls. Probably will buy another when this one finally does bite the dust ruclips.net/user/postUgkx43QMbQqu67IZadu9ou8Sg1BdrunMRNqX . No issues at all. Very happy with it.UPDATE: After 6 months of use and over 70 uses I would still highly recommend this pressure washer. It does vibrate a decent amount but never had it “walk” like others have mentioned. No oil leaks, still seems to run like the day I bought it. Still cranks within 2-3 pulls every time. Very happy with my purchase!Have used it about a dozen times now. Plenty of power, cranks up on 1-2 pulls every time. My only complaint would be I wish it was a little taller to make it easier to walk with it (hits my ankles a lot) and that the two hose connections were a little further apart but it hasn’t caused me any issues. Seems to run a good 1-1/2-2 hrs on a full tank, overall a well built machine and definitely worth the money in my opinion.
Omg, love you for doing this test! I’m new to this and I was having a hard time as factory hose was 15mm and the Uber flex is 14. So I was going nuts trying to figure out a setup. Now I’m confident in buying a 15 to 14 mm. Love your work, thank you!!!
Purchased the Uber flex after your no kink video, it kinked on the very first use! So bummed. It kinked so fast and so easy. I think I’ll go back to the flexzilla
I was a painting contractor for nearly 40 years and every exterior house or building I painted we pressure washed. I own 3 Graco pressure washers and we ran 150 3/8 hose and there is 0 pressure drop at that length. I'm not sure that running 100 or greater with an electric pressure washer won't cause it to wear prematurely.
Yea I agree with you. The pressure washer was definitely working a lot harder with the length
It would be interesting to see measurements taken at all points. Current meter on the AC. Flow meter on the supply hose. Pressure gauge also directly at the output. And a timer on how long it takes to reach full pressure.
But thanks for putting some effort into making objective comparisons in your videos. Curious on your thoughts of converting psi and gpm to Cleaning Units when comparing pressure washers, tips, etc. Would that allow a more fair comparison? Of course psi or gpm separately might be more important to some.
Currently shopping the on sale Greenworks Pro 3000 & 2300. Surprisingly, there isn’t a big difference between the two using your data from your other videos and converting to CU. Could be argued the 2300 actually performed better.
Why does my total stop system stop working after I change out the stock hose and wand that the pressure washer came with for my new Uber flex hose and McKillans wand (I have Sun Joe SPX2688-Max electric)
Once you get the pressure up you should always have the same pressure unless you change the tip. You have a volume problem though because the presure washer isn't designed to run that long of hose. Basically your gallon per minute is was down on s washer that size.
It’s crazy cause I was just thinking about this issue this morning, perfect timing. Happy Father’s Day Josh!
Very good info as some have mentioned a gas pressure washer with higher gpm and pressure will be affected by hose length
Thanks for the video, I wouldn’t have thought it would have the same pressure. Can’t wait for the craftsman 2400, I bought one and love it other than waiting on a replacement want since mine is leaking. Also bought the craftsman foam cannon and it works fine for me.
Just bought one as well. Ordered and placed quick disconnect and foam cannon with the hand gun nozzle.
Every imaginable question I've had, you've magically covered in your videos! Fantastic work - greatly appreciated.
100' 3/8" .. I'm looking at the gas Simpson 3200 PSI at 2.5 GPM, but I'm using it to clean around the house .. surface cleaner for the driveway, pool cage, etc. My old electric 2000 PSI at 1.2 GPM .. was taking forever.
Depends on pump output psi, gpm, hose length and psi you want at the nozzle.
Anybody have any idea why I would be losing pressure? I purchased the 30’ uberflex hose for my sunjoe. No leaks anywhere. Immediate loss in pressure from my factory hose. The unit sounds funny too. The Motor stays on longer when I power the unit on and it also runs longer when I release the trigger
I’m having the same issue, did you find a resolution to this problem?
Thank you for the 150 feet test cuz I needed that
Jaimerai moi aussi mettre 150 pied ques que cela a donner de ton coter
Awesome, thank you! This unanswered question kept me from ever considering a 100ft hose. Think I'm good with a 50ft. An extra 25ft would be nice sometimes though, and I have an extra 25ft uberflex. Just need that adapter to hook them up! 🤙
Anyone know if 1/4 and 3/8" with have different GPM? My washer is 2.5 GPM and is a foam monster but my 50' 3/8" hose is bear to drag around.
17:40 Great Effect! We see you 150 feet away, an in a nino second you're back to save your camera from falling over. 😄
I just bought the Greenworks 3000 PSI Electric, & it came with a 25 feet soft flex hose. And at my house I only have outside water faucets in the back of my house, & the idea of lugging the garden hose, electrical cable, the pressure washer, & its 25 foot hose to the front and across the lawn doesn't sound like fun to me.
So I'm getting an added 25 or 50 feet, it will still not cover all of where I'd need it, but those few times I need more I can wheel the washer, garden hose, power cord down my driveway & be able to just leave it in the driveway & not need to cross over the lawn.
I just an image of finding unseen dog poop that was left in the grass by one of my lovely neighbor's pets, & me when done & winding up the hoses, & cord using my arm to wrap them around, & then smelling something bad to late. btw, anyone walking a dog at night in a town where it isn't lit up like a big city should get an automatic ticket if they do not have a working flashlight with them, having dog poop bags is a given, & if not, two tickets.
Very impressive i actually bought the craftsman pressure washer but I bought the 50 ft flexilla hose it has been working very well thanks for your recommendations
I think as long as the hose will support the GPM being pushed you will not see a drop in PSI. Because most electrical units don't push much GPM its hard to exceed the limit of the hose. With a larger gas unit you would see a drop in pressure once the GPM capacity is reached from the resistance of the added length.
I wonder if there will be a loss of pressure if the cheap hose are kinked in multiple locations and then pulled straight. I thought my Ryobi electric pressure washer was going out soon as I could feel the pressure weakening, but changing to a 30' Uberflex hose made the pressure washer feel like new again.
Thanks for the video, Josh! Great information as it's difficult to find this test anywhere else other than what some people have said on various forums about pressure loss with 100+ ft of hose. I am curious if the flow rate (GPM) increases at all with a 3/8" hose versus a standard 1/4" hose with an electric pressure washer. I understand that a larger hose diameter would put more strain on the electric pump intended for use with 1/4" hoses. Thanks again, and keep making great videos like this!
I would love to know this as well! I’ve spent hours looking for an answer to this from a reliable source (or with video evidence).
Same. I'm also looking for a pressure and volume at 100' height haha
3/8's is were you loose pressure pass 75ft+
@@1kontrabida Makes no difference. The 1/4 vs 3/8 difference is so minimal.
Thanks for the video. On the water supply side from the spigot would hose length drop the performance of a pressure washer
great video, any chance you checked before or after the video the amperage at each configuration setup, would be interesting to know the increase in amperage at 100ft and 150ft viz-z-viz at 50ft!!! As the pressure increases to 1800PSI in each setup ... greater the hose length, greater the work the pressure washer needs to do till it reaches 1800PSI so I feel there will be definite spike in amperage, better to stay within the rated amperage of your OE washer
Always good to upgrade the hose and gun, but buy a gas-powered PW unit to increase GPM to up to\ around 2.5 and use a more controllable 40* tip. Then you have a versatile tool that can do some actual work. None of the electric units are worth buying.
I've been wondering how much difference the diameter of hose and fittings affects things, especially with 50'-100' length.
Wow that pretty much solves the myth of variation of hose length vs PSI. Great video Josh. Even though this is a video for pressure washer PSI, I can imagine that the fire department would appreciate your video demonstration. I'm sure this test applies to their fire hoses length. Very educational video. 👍👍
That's more different again. Their hose lengths work off the diameter and flow rate pressure of mains water. If you can closely match flow rate and then purge the air from the hose, it's almost the same as being rigged straight into a hydrant. However the engines are adjustable to correct for that and can even 'pull' the water from the hydrant as opposed to being fed the water. This applies less to fire department for this reason.
@@AlexYeets Whole textbooks have been written on fire department hydraulics along with pump theory. It was fun learning a bit of it. Kinda cool when you do the calcs in your head and the water comes out at the end at the proper volume. Longer hose is always going to need more pressure to meet the volume intended at the nozzle.
Yhok
This is true. But we calculate the friction loss of each size of hose and length plus the nozzle pressure. Lots of math involved but very easy to calculate in a hurry.
@Steve Marquez longer hose smaller diameter needs more pressure. Larger diameter hose doesn't require as much pressure. And we normally don't pump over 200psi
I would have liked to see a gpm test as I think the 3/8 hose would deliver more water at the same psi over the 1/4
Hi Bailey
It seemed that way to me as well, but its the orifice of the nozzle that effects the flow since thats the last point the water passes through
@@imjoshv Josh,
Are you stating that the gpm could not change unless the orifice size of the nozzle changes? Thus also changing the PSI?
Would it have the same water volume with (2) 50 foot 1/4" hoses at 100' with say a sprayer tip for a 3200 psi 3.5 gal washer? I don't see why it wouldn't unless the 1/4 inch hose without a wand on it would still reduce the water volume somehow? I think I will try that out!
Hose length and sizes will not change the psi output, but the gpm rating does.
Dude,
You can almost reach Chula Vista with those three hoses connected! 😂😂
Id be curious if you get more flow woth a 3/8 hose vs 1/4, and yes i know orifice matters
What difference gpm does the diameter of the garden hose that connects to the pressure washer?
I’m wondering if the GPM is the same for the 100’ 1/2 inch and 3/8 inch. That would make for a good video as well.
I ended up with a 5/16" hose. I have no idea. I know 3/8 is around 10mm.. It should all be metric.
"Its going to be a long walk with this 100 footer" LMAO Classic!
Pretty amazing information!!Thanks, Josh. Feel better.
I paused this at 2:40 & I'd bet next to nothing in pressure loss, If you think of the inner diameter of the hose x 100 feet, it is next to nothing. Damn I am an idiot. Why would there be ANY loss when dealing when fluids? Hydrodynamics will not allow there to be any loss without the washer blowing a seal, or the hose bursting, if you read Stephen King's The Eyes of the Dragon, you'd know if you wanted to have a rope, or a chain or in this case a hose fail, just keep making it longer, eventually you will find a flaw, & longer it is increases the chance of a flaw to develop over time. (btw, good book, it's set in the middle ages & has Randall Flagg as the antagonist, written for teens, but I've enjoyed everything that had King's Flagg in it)
Can you somehow but the gauge after the gun with the tip in it to see how much pressure is coming out of the gun.
glad i came across your channel, and this video i bought a greenworks 1500 electric and wanna put a longer hose on thanks for confirming no pressure loss and a new subriber
There is formal tables online I think it’s something like a 2precent drop per 100 foot
do you get more gpm with 3/8 hose?
Hope you can do a video of your best garden hose for detailing! I have the uberflex 30ft red color pressure hose now looking for a garden hose under 50ft since I bought one that's 100ft and it's a big mess to move around, too much hose for me
Thanks. I just watched another one of your videos. Just bought the recommended list of goodies.
What would be the recommended hose to use on the active 2.3? I’m between 75-100 ft?
THANKS MAN THATS WHAT I WAS LOOKING FOR VERY AFFIRMATIVE
Awesome video! Very informative! Think I’ll get the Uber flex 1/4 diameter 50 foot, and if I need 100 foot I’ll buy two of them! 👍
just bought a small Ryobi 1800 pressure washer, I will be getting a 50' Uberflex hose if I can find one in my area. tnks for the test.
Anytime!!
Hoping you can answer my question. I am new to home pressure washing, but I would like to hook up 2 - 50 foot uberflex to my WHOLESUN 3000PSI Electric Pressure Washer. Can I? What parts do I need? Thank you for your interesting reviews.
I am stunned that the pressure was the same with the 150ft. hoses combined. Wow!
Thanks. I enjoy and learn from your channel!!!!
Hey Josh. A bit off topic but I can’t for the life of me find any information on what ‘Area Performance’ means. My karcher K5 compact is 40 m2/h. Does this mean it’s only capable of doing 40 m2 before I need to let the washer cool down? Sorry if this is a dumb question I’m genuinely not able to find information on what m2/h means online.
Josh,
Do you happen to have a link to a quick connect attachment that can be used to connect 2 hoses in a situation like this that already have quick connects without taking all the fitting on and off? Not the coupler you used but something where you can keep your quick connect fittings in place?
i've looked and I can't find it. Thanks.
Instead of using the teflon tape, couldn't you just swapped a washer from another hose?
I bought the uberflex you suggested and it doesn't work with my electric pressure washer. I'm pretty sure it has a smaller ID than what came with the PW and it makes my PW leak when connected. Also because of the smaller ID when using the gun it sprays a mist instead of a high flow stream
You may have an m22x15 connection. What pressure washer do you have?
Obsessed Garage I think said around 250' is where you start to lose pressure
At what psi?
Thanks once again for the wonderful research on hose lengths. Good job. What was the pressure washer used in the test rig with psi details
What about GPM though. That should have been reduced
Great video topic! What size orifice would you recommend for an 1800 psi Ryobi for just spraying water on car with a 25 and 40 degree nozzle? Not a foam cannon. Thanks!
i like the 2.5 or 3.0 amzn.to/3xcuUZK
Thats a real awesome awesome video man, your effrots are much appreciated 👍🏻
Thanks so much
Great vid and demonstration again. What pressure washer were you using for the test?
Can I use any garden hose with pressure washer? I wanna get this stretchable compact hose I don’t know if it’s compatible?
I use an electric pressure washer and I think my 100ft hose makes the pressure washer not perform all that well.
I have a karcher HD professional pressure washer have you any idea what I need to use the quick connect as the M22 14mm fits but will not tighten up almost like karcher did something to stop you using none genuine hoses ???
Agree with you … 50 footer … great vid
I came in around 16:00 shortly after that sounds like a lot of air in the line 😆
Hi Josh. Nice video. Something I can show my engineering students. FYI: Pressure = Force/Area. Therefore you scan only change the pressure by changing the force of the area. This means the Inside Diameter of all your hoses is the same as the pressure is not changing. Lloyd
If pressure = motor size x surface area… shouldn't it change if you had a longer hose since the surface area would increase? Ugh I hate math! 😖
@@moxee33 the Area is the cross sectional area of the hose. If the inside diameter (the hole) of the hose is 10mm then it has an Cross sectional Area of about 78 square mm. This is constant along its entire length. As this doesn’t change and the Force applied by the system doesn’t change, the Pressure can’t change. Lloyd
@@indetailcarcaresolutions3770 I understand now 😀 thank you so much for the clear explanation! 👍
Does that putting the pressure washer pump hard at work.
Awesome video, step by step and super clear
Thank you 👍👏
I just order the Yamatic superflex 75’ 1/4 hose for a retractable 50’ reel. I’ll let you know how is it. The store said it will fit w no trouble. Or you have any other suggestion?
I noticed that when you test the 100', it re-pressurizes slower than the 50 ft test. Is there a way to avoid this? Is this harmful to the pressure washer?
It seems like it’s working the pressure washer more… I’m not sure if that will effect it long term but it seems like it would wear it out faster. I recommend getting two of the 50’ and linking them when you need the extra length, but most of the time just use the 1 50’
Do the same test with cordless pressure washers like karcher k2 or ryobi, machines that produce 1000~ psi
I think 50' is the gold spot. If you're using stuff like snow foam cannons or anything like that, it will be irritating to wait for it to charge to full pressure, so I think that is where I will stay.
If you're using the machine for things like drive pressure washing or signage cleaning or massive hgvs where you're spending a long time with that trigger pulled anyway, then the extra length is certainly needed and the charge time is more tenable
So my stubby gun has a m22 14mm fitting but my Sunjoe has a 15mm connection..I'm not sure what I need to use that stubby gun I bought but does anyone have any suggestions please?
i tried using the pressure gauge on my Ryobi 2300 psi electric pressure washer but does not work, im returning the pressure gauge because they are not made for electric pressure washers!
Great experiment Josh, thanks for taking the time 👍😁
Thanks 👍👍
Does hose length affect the pressure washer (i.e. life of the pump)?
Thank you for putting to the test!
How much did the harbor freight pressure washer get psi on that machine, also what pressure washer has the highest psi u have ever seen so far, only need one with high psi for sidewalks an decks only, so want a higher psi under $500.00
The real key is how your downstream injector is affected. Generally the longer the hose, the more resistance and less of a draw.
solid vid...hey man any chance youll be getting your hands on the new big mouth foam cannon from chemical guys for review? thinking about getting it but no videos on it except for their own so i cant take that as a genuine review hahaha
I have their torq and honestly the sunjoe $20 cannon from Walmart is just as good. Added a 1.1mm orifice and the foam is very thick. Ppl seem to love the mtm hydro but it’s $80.
I misread the title and thought it said “…HORSE size….” Hilarious
Hi Josh one of my apts has ro hot water as a water supply what pressure hose do u recommend I need 50ft minimum. As my setup is only using a 6 foot input to my Kranzle?