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Product Description

Roman's 4000 PSI KNOCK OUT is a cleaning machine that is affordable, powerful and convenient to use. It keeps your home and business clean and neat - the gasoline powered KNOCK OUT is easy to use, safe and operator friendly. Great for cleaning golf carts, home siding, spa areas, decks, kennels, driveways, parking lots, playground equipment, outside grills, animal pens, dairy barns, and the list is endless...


Up to 4000 PSI Water Pressure

4.0 Gallons per Minute Flow Rate

11HP Honda OHV gas engine with Easy Start Valve and Oil Art

Triplex Ceramic Plunger Oil Bath Pump

Automatic Trigger/ Gun with Dual Lance for Positive Conversion from Chemical to High Pressure Cleaning

Hose, Gun, and Wand Hold Holder

3/8" x 50' - High Pressure Hose

Soap/ Injection at Low PSI

10" Pneumatic Wheels

Environmentally Safe Powder Coat Finish

Shipping Weight: 150 lbs

Cat Pump


13 HP Oil Alert Honda Engine and 4 GPM Pump Produces Inustrial Cleaning Power

50 Foot 16,000 PSI Burst Strength Hose Insures Performance and Safety

Frame Design and Front Foot Eliminates "Walking"

Dual Lance Positive Control Gun / Wand Makes Soap / Chemical Application Easy

Welded Frame for Industrial Quality, Strength and Long Life


Ergonomic Unit Design Promotes Operator Safety

Hoses, Wand/Gun, Soap/Chemical Pickup Secure to Unit during Transport

Permanently Affixed Bilingual Operating Instructions Fosters Users Safety Compliance

Instruction Manual addresses Safety Issues


Pnuematic Tires Makes Rough Ground Movement Easier & Reduces Vibration

Knockdown Frame Design Takes Less Space in Vehicles

Ergonomic Design and Optimized Weight Distribution  Enhance Easy Transport


2000 Hour Honda Engine/ 2000 Hour for Pump, Long, Trouble-free Life

Carbide High Pressure Nozzle Lasts 50 Times as Long as Steel

Extra Large, Cleanable In-line Water Filter Promotes Long Life

Welded Frame Resists Breakage even when dropped

Simple Tools Required for Maintenance