Sorry for jumping in here, but your thread answered a lot of my questions and I thank you for your feedback.
I also am experiencing lines from my spray and am using Black Mac from McAsphalt and my unit was purchased from Protect. I have brass tips and would like to know where I can purchase either Ceramic or Stainless still tips?
Any suggestions would certainly help me out greatly.
Shawzer, how are you making out with the advice given by JF Gauvreau? I hope the tips and new filters are the solution. I use a clean tip and filter for every driveway.