I am new to the skid thing as well as the chemlawn guns. I bought a 200 gal skid with a Honda engine, Kapa pump and 300' 3/8hose on electric reel [I know 1/2 would be better but this is what it had]. I seems to spray good about 200 PSI at pump but it seems like my pressure changes while spraying with the jet agitation on. On the pump it has suction line from the very bottom of the tank, the bottom of the regulator has a hose going into the top side of tank and the outlet side of the regulator it has a line with cutoff going to the bottom side of tank for jet and a hose with cutoff going to the reel. While spraying it seems like the pressure is changing so I check and it is. This is with the agitation on, with it off it does not seem to change much.