My "new" machine (RB 400 K): WADU capable?

[GraffBuster]

That's a Stihl, with an 11 HP Honda. (GX340). I requested an Owner's Manual from Stihl, and it arrived Friday. The machine is on its way from California. (An eBay deal.) Maybe some day I'll have a hot water machine with more HP, but this is my "foot in the door."

I should have checked the label on my WADU (the only "manual" for one of those) to see just what it needs to power it, but it's still in its carton at the place I'm storing it until I finalize the deal for rented space in another town. The Stihl manual says the pump operating pressure is 2175 PSI, and the cutout pressure is 3045 PSI. Cutout pressure is a new term for me, so I searched both here and on Google; no joy. I'm guessing it's a safety release; anyone want to educate me on that?

The specs also say it'll make 5.5 GPM, which I like. I read somewhere that a WADU has a 2504 tip on its gun, so I wanted to get some professional opinions on whether the WADU and the RB 400 K will play well together, or if I should shop for a new tip before getting into too much serious usage.

As always, thanks for your input.

 

[Dave Olson]

If your Wadu is like ours it will work at lower pressures and volumes, it just works better at higher psi & gpm. We run our using a #6 tip at 3000 psi.

With that said soda blasting is next to the last choice of tools that we use to remove graffiti. The only thing more expensive that we use is adhesive remover.

 

[GraffBuster]

Thanks, Dave.
I'm also going to look for some prices on magnesium sulfate (Kieserite), which is supposed to strip stuff twenty to thirty times faster than soda. If the price is better, or at least equivalent, the increased efficiency might be an advantage.