What is better, 2 or 4 Nozzle on Whisper Wash Big Guy?

JWBris

JWBris

New member
Will I get a deeper clean from my 4 nozzle 28 inch Big Guy if I convert it back to 2 nozzle by blanking off the 2 inner nozzles on really dirty mouldy concrete?
I currently have a 3600psi 9GPM machine running 4 x 2.0 25 degree nozzles and was looking to go back to 2 x 4.0 25 degree nozzles figuring that I would get more intense water flow from coming out of just 2 nozzles rather than spread over 4 nozzles.
 
Guy Blackmon said:
You can only clean so deep before you run the risk of etching the concrete. Pre & post application of proper detergents will help greatly.
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I have a contract to clean a boat ramp and it gets so full of scum and slime so quickly, and obviously I can't use any chems as it runs straight into the water.
So it a dirty old concrete ramp and after I run over it with my 4 jet Big Guy, I then still don't have the clean that I want. I use a lance with an 9.0 nozzle and it cleans it off perfectly.
So that indicated to me that the more volume of water was making all the difference. That's what made me think of blanking off 2 of the jets to get more volume of water through 2 jets rather than 4. Still adding up to the same nozzle size so the pressure is not changing.
Do you run 2 or 4 nozzles in your rotary cleaner?
 
We run 4 nozzles bars on our surface cleaners.......To get more impact you could change out the nozzles and replace them with 15 degree nozzles. If 4 like that don't work try blanking off 2 holes and just running two 15 degree nozzles.......yours is a interesting situation for sure.

Turbo nozzle on a lance could also speed things up if surface cleaner doesn't work as well.
 
Guy Blackmon said:
We run 4 nozzles bars on our surface cleaners.......To get more impact you could change out the nozzles and replace them with 15 degree nozzles. If 4 like that don't work try blanking off 2 holes and just running two 15 degree nozzles.......yours is a interesting situation for sure.

Turbo nozzle on a lance could also speed things up if surface cleaner doesn't work as well.
Click to expand...


Yeah I might try some 15 degree nozzles first and see it that lifts the slime a bit easier.
I currently just use a Suttner Turbo Nozzle for the edges, but as the ramps total nearly 300 sqm (3200sqfeet), it will take a lot longer, and hanging onto that 9gpm lance for ages won't be that much fun compared to pushing the Big Guy.
Thanks for your advice Guy and have a great weekend.
 
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