About those swirl-lines left by the surface cleaner...
…you want to go fast ? ...you need more volume.
Otherwise, the "band-aid" is wider nozzle spray.. got 15's ? …use 25degree nozzles.
But, a wider spray pattern is less impact on the surface.. less clean.
Pressure is your BEST friend to a point …4000 to 4500 psi max.
Pressure is what removes debris from the surface. Volume is work-speed.
Here's some info for the rest of you too...
You know a surface cleaner is 50% faster than a wand for flatwork.
Well, a Vacuuming Surface Cleaner is ANOTHER 50% faster...
You don't have to rinse what you loosened. It sucks everything up as you go !
The "perfect" surface cleaning system is like this...
A 21" surface cleaner "comes to life" with 4 to 5gpm at 3500 to 4000 psi. You can enjoy
a "Lawnmower's pace" for workspeed with 5gpm with 25 degr. nozzles.
If you only have 3000 psi, for a quality-clean, you'll have to slow it down with 15degree nozzles.
And if you go over 5.5 or 6 gpm with a vacuuming version surface cleaner, you loose the ability to capture the water.
The right Vacuum System makes the most efficient combination for your 5gpm 4000psi system...
An electric vacuum can run our SC21V at 100 ft ! = a "compelling demo" !!
...5000 psi will allow you to go FASTER, just don't go over the 5gpm, or
you'll need to get a gasoline engine vacuum system ... to be really impressed.
Glad to help !
Jerry McMillen
800-400-2532
jerry@PressureWasher.net www.PressureWasher.net
mfr. of BullDogPro Industrial Water Blasters,
VacuBerm Reclaim tools, and Sirocco Performance Vacuums.