"Hi Simon, i see where you are coming from mate, so basically output from your extractor's solution quick connect into the pressure washer and then output from the pressure washer to the wand... why?"
Russ,
It was in response to Marc's comments about tap fittments and or having a tank in the van. I agree topping up the solution tank is an issue but given you will have to empty the extractor at some point, unless you have a pump out system like Mike suggested, it's something us Porty users do any way. But your point is well made.
"The extractor would still need to be topped up manually which defeats the object, also the extractor would probably not be able to supply enough flow to the pressure washer for it to work correctly."
Would not the extractor be under pressure constantly feeding the pressure washer? If the through flow is an issue how would a tank in the van keep up? Most tripple and some twin vacs have 500psi+ pumps, would that not work?
If I was to go this route I would probably use the method you suggest I was really looking for alternatives to promote the discussion further, like with a cold supply one might like to add a chemical rinse easy with a tank but unless there is an injection system on the washer it's more difficult. I don't have nor have never used a TM or water temps above 60/70 degrees, and normally I rely on 'tap hot' but I have been considering an inline for sometime and your system is more appealing because as Fintan noted the pressure washer offers more flexibility as a stand alone unit. You have developed an interesting idea that works and have captured a lot of interest, I hope my questions and comments are seen as interest rather than anything else. I enjoy topics that get the brain working and some of the other suggestions have been excellent.
Simon