I have a 3.8 GPM 3500 PSI hot water unit. What tips do you suggest I use on the my surface cleaner. It has 2 bars. Should I still be using the 4.0 tips with a 15 or 25 degree on it? I am still pretty new at all this so thanks for the help. By the way, its a 20" Whirl-A-Way surface cleaner.
Tim