The Karcher 11-3 Soft Wash Kit is a complete gas-powered soft wash unit engineered for high-volume, low-pressure cleaning of delicate surfaces — vinyl siding, painted walls, stucco, soft wood, roofs, screens, awnings, and any material where high-pressure blasting would cause damage. The kit pairs a Honda GX200 commercial gas engine with a Comet pump on an aluminum chassis, delivering 11 GPM at 290 PSI.
Soft washing uses high water volume at low pressure to safely deliver cleaning chemicals to delicate surfaces. The technique combines water flow with cleaning chemistry (typically sodium hypochlorite-based solutions) to break down algae, mildew, dirt, and biological staining without forcing water under siding seams or stripping paint — making the 11-3 a popular choice among professional house washers, soft wash contractors, and exterior cleaning crews.
Note: This unit ships as a kit with components arriving individually. Assembly required.
What’s included. Comet pump, Honda GX200 engine, aluminum chassis, and an extra bracket for pump mounting.
Comet pump. Engineered specifically for soft wash applications. Low pump speed for cooler operation and extended service life. Stainless steel construction with aluminum head plates to prevent misalignment under heavy use. Chemical-resistant polypropylene for all wet parts, allowing the pump to safely deliver typical soft wash chemistries without degrading internal components. Rated for an 8-hour day-work duty cycle.
Honda GX200 engine. A workhorse small engine for commercial cleaning equipment, offering a high power-to-displacement ratio. Easy starting via a decompression system. High-quality materials, low fuel and oil consumption, and reduced vibration and noise compared to lesser commercial engines.
Aluminum chassis. Corrosion-resistant aluminum chassis with skid feet for trailer mounting. Includes vibration isolators that protect the pump from engine and road shock during transport and operation. The extra bracket included with the kit is for secure pump mounting.
Specifications: 290 PSI · 11 GPM · Honda GX200 gas engine · Comet pump · Cold water · Aluminum chassis · 8-hour day-work duty cycle · Assembly required.
