How about the MasterBlend range ???
The TRUCKFORCE 3500
TF3500 features: maximum vacuum performance for carpet and upholstery cleaning. Three two-stage vacuum motors, in-series, provide over 190" of water lift (14" of mercury) and 100 CFM. All vacuum connections and piping are 2" in diameter to maximize airflow and produce fast drying times with 100 feet, or more, of 11/2" vacuum hose. Each vacuum motor can be independently operated, so that single or dual vacuum operation is always available for cleaning upholstery and delicate fabrics. The 1.5 gpm 500 PSI pump is EASILY adjustable from 50 to 500 PSI by the pressure regulator on the control panel. The pump is powered by a 1/2 horsepower high-efficiency, dual capacitor motor.
With all plumbing at 2", I don't know why one would use 1&1/2" vac; hose when 2" would give better airflow.
Hooked up to an lpg heater, this would be a fairly formidable machine for a lot of knowledgeable operators, that know how to get good results without running a lot of hose.
It's also an auto fill / auto empty machine, if one were to put a pre-filter/submersible pump in-line on the vac; hose, waste water could be diverted to a waste point before it ever gets to the machine.
Oh yeah, Europe, Oz and a lot of other places run on 220/240 volt, 50hz power, so two leads are usually not a problem.
Another good thing about potties is the security issue when working in premises on your own and you want that door locked.
Ooroo :roll: