VoltageHeating FuelPrice Call to order
230V, single phase, 60HzNo.1 or No.2 Heating Oil$9,339.00 1-800-471-7157

The Super Max™ 12820 AST® high-powered, industrial electric pressure washer features Daimer's exclusive AST® (Automatic Shutoff Technology ). This robust pressure washer machine can be used individually as a cold water, hot water, or steam pressure washer with temperatures up to 330°F. Powered by a 1.5 HP NEMA engine, the 12820 AST® offers a flow rate of 3 GPM and pressure level of 1500 psi, making it the ideal pressure washer solution for a variety of moderately demanding industrial applications.

Have a question about this item?
Contact us and a sales representative would be glad to help!



Price excludes freight.

View This Video - Discover Daimer's Absolutely

Outstanding Wet Steam Degreasing Capabilities

Loading the player…


truck mount pressure washer, steam pressure washer 

The Super Max™ 12820 AST® highly-powerful, industrial electric pressure washer features Daimer's exclusive AST® (Automatic Shutoff Technology ). This elite, world's only technology greatly reduces the wear on the pump and other components and adds to longevity of the 12820 AST®. As a rugged tri-mode pressure washer, the 12820 AST® can be used alternately as a cold water pressure washer, hot water pressure washer, and steam pressure washer; offering hot temperatures up to 220ºF and steam temperatures reaching 330ºF.

This rugged, mobile electric pressure washer is capable of a high flow rate (3 GPM) at a pressure of 1500 psi. Powered by a robust 3 HP NEMA engine, the 12820 AST® offers users the opportunity to choose between no. 1 or no. 2 heating oil, diesel, or kerosene heating. Further adding to the flexibility of these tri-mode pressure washer machines is the ability to be purchased with several additional options, including: optional two gun operation and the ability to operate as a trailer mounted pressure washer.

What is AST® Technology?

AST® is a proprietary system that works as follows: When AST® is engaged, it shuts off the pump and motor after 30 seconds if the gun is not in use and water is not flowing through the system. When the pressure washer operator pulls the trigger again, the motor and pump go on. This feature is particularly useful for applications in which the pressure washer operator is using a long hose, say more than 25 feet, and it is not practical for them to go back and forth to the machine to turn it off during every break.

The pumps and motors in conventional electric pressure washers remain active whether or not water is flowing through the system. As a result the user has to keep walking back to the system to shut it off or risk damaging the motor and pump.

Daimer offers pressure washers in a variety of power configurations for worldwide requirements. The following are available: 110-120V, 208V, 220-240V, 380V, 415V, 440-480V, and 575V; single and three phase; 50 or 60 Hz. Please contact us for pricing.

Product Specifications

Warranty1 year (limited)Water Pump Warranty5 years (limited)Motor/Engine Warranty2 years (limited)
Pressure1500 psi
Flow Rate3 GPM
Temp. Optionscold, hot, wet steam
Steam Temp.up to 330ºF
Hot Water Temp.180ºF - 210ºF
Standard Power Methodelectric: 220V-240V, single phase, 60 Hz
Optional Power Methods(call for pricing) 220V-240V, single phase, 50 Hz; 220V-240V three phase, 50 or 60 Hz; & 440V, three phase, 50 or 60 Hz
Motor Sizeheavy-duty 3.0 HP - NEMA
Minimum Generator Size9000 watts
Gasoline/Diesel Fuel CapacityN/A
Ignition Systemelectronic direct spark
Power Cords1
Heating Methodno.1 or no. 2 heating oil; diesel; or kerosene
Heating Fuel Capacity9 gallons
Heater Exchange Coilheavy duty schedule 80 heating coil
Heater Response Timeconverts cold water to hot water in approximately 30 seconds
Operating Timecontinuous use
Pump Drive Methoddirect drive
Chemical Infusionyes, high pressure injection
Wand Includeddurable 3' trigger wand with quick disconnect
Nozzles Standard0º (blast), 15º, 25º, 40º, steam nozzles
Pressure Hose50' high pressure steam hose
Pressure Hose Optionsadditional/customizable lengths available
Dimensions25"w. x 32"d. x 42"h.
Housingstainless steel and powder-coated, high gloss, chip/chemical resistant
Colorblack and silver
Phosphatizing SystemN/A- see Super Max 12820 AF
Acid/Phosphate Chemical FeedN/A
Trailer Mountwheels removed - same price
Multi-Gun Operationoptional - call for pricing
Wall MountN/A
Wet Sandblasting Systemoptional - call for pricing

Parts List


Standard Parts / Quantity

3' Durable Trigger Wand with Quick Disconnect 1
0º (Blast) Nozzle (not shown) 1
15º Nozzle (not shown) 1
25º Nozzle (not shown) 1
40º Nozzle (not shown) 1
Steam Nozzle (not shown) 1
50' High Pressure Steam Hose (not shown) 1



Power Wash Machines: For Clean And Safe Industrial Applications

To maintain industrial settings at its best and provide employees with safe, clean and pleasant working environments, cleaning experts have to eliminate a large amount of dust, dirt, grease, and grime from large areas. As trucks and trailers keep coming in, these large vehicles bring in lots of dirt and mud into the industrial area. The dirt will be deposited along the driveways, parking lots, and warehouses. The vehicles will also be blanketed in dust and splattered with mud after long trips. Cleaning all these different surfaces requires the use of versatile and powerful industrial pressure washers.

Daimer® offers you a stunning series of high-powered pressure washer machines specifically designed for use in industrial settings. For instance, the Super Max™ 12820 AST® is among those powerful, industrial versions of electric pressure washers featuring the right aspects required for efficient management of industrial cleaning jobs. Hot water pressure washer comes with high pressure levels of 1500 psi and flow rates of 3 gpm in addition to tri-mode capabilities. These Hot water power washers generate steam at temperatures as high as 330ºF and hot water at temperatures of up to 210ºF.

Heated pressure washer, such as the Super Max™ 12820 AST®, also feature an auto shut off function. If an electric powered pressure washer comes with this technology, then users do not have to manually shut down the pressure washer machines during every break. Once the trigger gun in this electric pressure washer is not in use for over 30 seconds, this function will ensure that the motor and pump is automatically switched off to avoid components from overheating.

  Contact Us
Before You Go
Sign Up For Our Email Newsletter

so That You Can Get Discount Coupons, Promos, Company News and More!


Before You Go

Help us understand why you're leaving

Did you find what you were looking for?
What could we improve to earn your business?

   I am not leaving