I use the Drimaster hand tool with my PowrFlite porty. I have to turn the pressure down to about 100psi and only use half to two thirds throttle on the drimaster valve, and I still go through approx 60 litres to clean a 3 piece suite.
I also have the CFR hand tool, but I prefer the Drimaster in most cleaning situations. It leaves the upholstery drier also.
Pete