Guys,
As we are discussing Power or Finesse, and as an avid believer in proper preperation my point is, despite having ample power on tap I feel there is no substitute for pre extraction vacuuming, etc. My usual cleaning pressure is between 250 and 350psi, which when used in conjunction with my twin jetted (8001) prochem wand produces frugal water consumption, very good dry times and most importantly great results!! The inline heater is also capable of holding the desired temperatures with this set up.
Gary,
Regarding your Tech question, I see your point but I pressume 500psi may have been a conservative figure stated by Cleancraft?? Although as I have said I dont clean with the 900psi, I do run 350psi, 3 vac motors and the inline heater sometimes wound up without any problems tripping out.
Paul