I have the 4200 psi washer. Will this thing explode and cause a tsunami or can i just dial it down and bit an use it just fine?

Pressure gauge and pressure unloader knob to dial down the pressure it will work fine. If you only turn the engine speed down it may not be enough to drop the pressure low enough. Also the static pressure when you open the trigger may be quite large even though you are running less pressure when operating. For example I’ll dial down my bigger unit to 3200 psi delivering water but the gauge will read 5000+ psi when I close the gun and that has cracked the steel attachment pivot on two 10” surface units rated at 3200 when I opened the flow. You can’t open k lbs of pressure slowly.

what is the brush material, wire or softer? I need wire or very stiff bristles.

Very stiff bristles, but that really doesn't matter as it doesn't come into contact with the surface being cleaned. Its the 2 nozzles rotating that does the job.

Will this unit work with a 2800 psi Troy Bilt gas power washer?

I'm not sure about a 2800 PSI but mine is a 3750 PSI and it struggled to work and second day the nozzle broke off of it so I neither have to tap it to get it out wasn't worth the money for me

I am getting 4400 psi 4 Simpson power washer??? Can I use this with that????

Not recommended, the components of the surface cleaner are only rated to 3600 psi. You may want to look into Simpson's Surface Cleaner 80182 rated at 4500 psi.

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SIMPSON 80165, Rated Up to 3600 PSI Universal 15" Steel Surface Scrubber for Cold Water Pressure Washers, Plain

Product ID: 687541226

Details

Brand
SIMPSON
Colour
Black
Global Trade Identification Number
Item Weight
5.5 Pounds
Maximum Flow Rate
3.4 Gallons
Maximum Pressure
3700 Pound per

🌀Dual rotating jets for streak-free clean

💨3600 PSI max power

🛡️Powder-coated steel shroud for corrosion resistance

Description

🧼 Clean smarter, not harder — dominate your outdoor surfaces with SIMPSON power!

DOUBLE JET EFFICIENCY - Two high-pressure rotating jets deliver 10X more coverage than standard nozzles—clean faster, not harder.
DURABLE DRY OPERATION - Powder-coated steel shroud prevents overspray, keeping you and your surroundings dry and protected.
MAINTENANCE MADE SIMPLE - Includes nozzle cleaning tool to ensure peak performance and extend product life.
UNIVERSAL QUICK CONNECT - 1/4-inch QC connection fits most spray wands for effortless setup and compatibility.
MAXIMIZE YOUR CLEANING POWER - Rated up to 3600 PSI for tackling the toughest grime with ease.

The SIMPSON 80165 is a 15-inch steel surface scrubber designed for cold water pressure washers rated between 2200 and 3700 PSI. Featuring dual high-pressure rotating jets, it delivers 10X more coverage than standard nozzles for fast, streak-free cleaning of driveways, patios, and sidewalks. Its powder-coated steel shroud resists corrosion and minimizes overspray, while the universal 1/4-inch quick connect ensures easy compatibility with most spray wands. Includes a nozzle cleaning tool for hassle-free maintenance.

Specifications

ASIN	B07H5BJ3VR
Brand	SIMPSON
Colour	Black
Country of Publication	USA
Customer Reviews	4.1 4.1 out of 5 stars (5,367)
Global Trade Identification Number	00879399001772
Item Type Name	15" Steel Pressure Washer Surface Cleaner for Cold Water Machines, 1/4" Quick Connection, Recommended Min 3000 PSI up to Max of 3700 PSI
Item Weight	5.5 Pounds
Manufacturer	SIMPSON
Manufacturer Part Number	80165
Maximum Flow Rate	3.4 Gallons Per Minute
Maximum Pressure	3700 Pound per Square Inch
Model Number	80165
Number of Items	1
Number of Packs	1
Power Source	manual
UPC	879399001772
Unit Count	1.0 Count

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