boxxer 421

Jets have been changed from 3 gpm to 1.5 gpm and it will hold 210' with wand wide open and 180' with rx20 wide open, i did send it in to the dealer and they said all they did was changed my jets..... this was my recommendation whether this is all they did or not only the fly on the wall will know ....... ps i will let you guys know if the rx20 works good or bad on concrete floor cleaning within a week i will do a 5000 sq foot open style fruit/vegetable market with the scrubber head Thanks for all the suggestions and help