Dan Kraft
04-17-2007, 10:01 PM
A few years back I purchased a graco 3800 hvlp sprayer. Ever since i started using it I have had the same problem with it. When spraying my volume of spray will diminish. By placing my finger with a rag over the nozzell and pulling the trigger briefly it will return to spraying correctly. I have cleaned the gun very well and also replaced the duckbill valve a few times, none of this seems to help. Any ideas? Thanks