Getting conflicting advice. I have a 4/4 machine, my 16 " surface cleaner came installed with 25020’s, but BE sent me 25025’s as backup. Which should I run. Don’t want to find out the hard way by ruining a driveway. Thanks in advance.
Either will work. Do a test on some concrete off site. I’d run the larger though. You don’t need 4K psi to wash concrete. You may end up needing a slightly larger set to decrease psi.
The most you need on residential concrete is 2500 psi. Anything over that cleans the same, and more could cause damage, take cream off
I have a 4/4 currently and I carry both sets. If you are doing newer concrete use the 25025s. If it’s old and beat up with aggregate showing through I’ll use the 2502s. You don’t want to strip the cream off new concrete with 4000psi. It’s not a bad idea to have spare sets because they can clog…especially the smaller 2502s
Hey thanks for info. ! My confusion is this : 25020 = 25 degree spray pattern, 2.0 ( half of 4 ) per nozzle in 2 nozzle s.c… So does that mean there is 2000 psi at each nozzle ? If so, that means the concrete is only seeing 2000 psi… Am I wrong… please set me straight if I am.
The 2.0 is just the orifice size. If you look at the nozzle chart the #2.5 will put you at about 2500 psi. The #2 will put you at 4000 psi.
Since you know the nozzle size you need to follow the #2 (or 2.0)to the right until you get half of the gpm of the machine you’re running. (half the gpm because there are two nozzles on the sc) Since yours is a 4 gpm you follow it until you see 2.0 gpm or close to it. Then follow up for the psi which is 4000. If you do the same thing for the #2.5 the closest number to 2 gpm is 1.98. You then follow that up for the psi which is 2500.
You use the chart in reverse if you are ever looking for a nozzle size that will put out a certain psi. Say you want a nozzle that puts out 1000 psi for you gun. Find 1000 psi in the top row. Follow it down to 4.0 (the gpm of your machine). Then follow left for the nozzle which is a 8.0.
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Whoa… marinegrunt… you just dropped a huge knowledge bomb on me. I now see where I was going wrong…hence the confusion. Thanks so much. Next time your in Canada… look me up… I’ll buy the beer.
Best simple explanation for the nozzle chart I’ve seen.
@marinegrunt @Racer Evening fellas and anyone else that might wanna read this and chime in 
I was hoping that I could get some help with the nozzle sizes - I am looking at the JROD that I got online for my 4gpm machine and it shows 2510, 2540, 0010, and 0040 nozzles (pics below)… Based on what I have read on these forums, I understand the first 2 nozzle numbers are for the degree of spray and last 2 are for orifice size (correct me if wrong please) but using chart above, the 2540 and 0040 nozzles will produce 40 psi, and the 2510 and 0010 nozzles will produce 700 psi, just at different spray patterns?
The goal is house washing with a ds injector and I know around 150 psi is all that is needed for most of the vinyl siding in my area, so maybe this is correct… 40psi just seems low and 700psi seems high. Learning as much as possible before getting started and the nozzle charts is the one thing I am having trouble with. Why some nozzles have 5 numbers and some have 4 - Any help would be much appreciated.
For example my surface cleaner uses the 25025 nozzles - which based on the nozzle chart in the above post - if I want 2500 psi I follow that down to 2 (4gpm/2 nozzles) and over to 2.5… which makes sense, but why 25025 instead of 2525? An explanation of how to read the nozzle numbers as if I am a 5 year old would be incredibly helpful.
Thanks,
Andrew
The tips I soap with I rinse with……more efficient and safe that way.
On the surface cleaner nozzles, or any for that matter, if you have a 5 digit one, that just means it’s a 1/2 size. So your SC has 2502.5 which is between a 2502 and a 2503. They just don’t put the decimal.
On the Jrod, who sold you that? Take my advice and trade it back in on a M5DS 3-7 gal nozzle… They cost about $55 -60. You’ll thank me later. If for some reason you need higher pressure use one of the hp tips that came with your machine.
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