Set up my 25 gallon FIMCO sprayer (w/boom) fee weeks back and had it working well. Used it a few times with no problems. Only have been spraying 3-way and acclaim with it. Have used surfactant/s and/or dyes in some of the apps. However, tonight I'm spraying a property and about 10 minutes into it I notice my pressure dropped from 30 psi down to 20. Tried adjusting the bypass valve to get the pressure back up to 30 and it just wouldn't go...she dropped back down to ten. Couldn't get her above 15-20. First thing I checked was the strainers on the tips...no problems there. Nothing in the tank that I can see plugging the intank...The spray wand works fine...the boom not so much. Is there some type of internal strainer/filter/etc. located in the pump itself? Do you think the line could be plugged...not sure how in the world that could happend but...i just don't know. Obviously not very experienced with this and looking for places to start looking. thanks for any help/advice.