40 degree tips on surface cleaner?

Dear everyone,
I searched but did not find anyone using 40 degree tips on surface cleaner. Why is that?
I find that 40040 tips work like a charm on my surface cleaner (BE 20"). Significantly faster.
My machine is about 8.5GPM, gauge reads about 2800 PSI. With 40 degree tips, I guess the actual PSI on the concrete would be around 2500PSI?

I use those same tips in my 21" surface cleaner. I got in my 8 gpm machine and failed to order the correct tips. Had to go local and that was all they had. It has worked well, so I have left it alone. That is not to say that 25 degree might be better just that it is working fine at a good walking speed with no swirls or lines so if it aint broke done fix it?

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Same here. They don’t have 25040 or 25045

I need to install my 2503’s today, the 1503’s made some smoother concrete look like a racetrack yesterday.:flushed:

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Wouldn’t this depend on…

  1. What height you’ve set the bar at?

For example, if you have your bar low with 15° nozzles, then raise it up - the fan will be more like having a 25°.

  1. the length of the bar (in relation to the diameter of the surface cleaner metal/plastic shroud)?

So if the bar was a 20” bar in a 20” shroud, the wider 40° fan would hit the inside edge and only half of the fan would work?

(Some bars are 18” inside 20” shrouds and so the fan would be better “shaped” in these ones maybe)

Can’t raise the bar on model. 40’s will hit the shroud. Need 25’s

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I have 18" on 20" SC. It seems to work for me. not touching the shrouds.

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What size tips are you currently using ?i just got a WW classic 19 inch . My current set up is 5.5 3500 psi . I’m trying to look at the chart and I don’t understand it. The ww comes with 2502, but not sure if that’s correct . I really paranoid about etching the concrete . I just want to make sure I get the correct one. Also would you recommend different nozzle tips for commercial and resi ?

@marinegrunt does a good job of explaining it here

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2503 is what i use on my 5.5

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Same here

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Ok thank you , base of my research that’s what I narrowed it down too.

Two nozzle bar, ~5.5 gpm - according to the chart 2503 will result in 3500psi, 25035 will result in 2500psi.
Most recommendations are for ~2500psi on residential concrete, although some run somewhat higher, at least from what I remember reading.

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@Genaroguzman

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Thank you @chesebro, I actually hit reply to @genaroguzman, but something didn’t workout quite right and I didn’t notice…

Edit: apparently replying to a post doesn’t work on my old phone :frowning:

Maybe on a chart, haven’t looked.

Real world…2503 x 2 nozzles with 200’ hose is 2650 psi. Pump is 5.5gpm with a gx630 engine.

@SurfaceTherapy
What I have also read on here is that nozzles wear out over time, which would mean bigger orifice/lower psi.

I don’t have a pressure washer yet, still learning, so I am only repeating what I have read on here.

I think your tips might be worn a bit. Or maybe my pressure gauge is off. I’m getting 2600 psi at the gun with 225’ of hose and 3.5’s in my cheapo Rigid surface cleaner.

That’s on a 5.5@2500 gx390 machine.

Hey Alex , Are you using 25035 nozzles ?

Yes I am

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