What???  I'd be really interested to see a picture of a hot water pressure washer that had the pump after the heating coil.  That's most of the reason that hot water pressure washers cost so much.  It's also the reason that you can't just hook your pressure washer up to a hot water tank and have a hot water washer.  I know for a fact that the pump used on my Aqua Blast hot water washer also gets used on other brand cold water washers.  I think you've been misled.

Mike