Just use a low pressure rinse tip, or crack your ball valve, or use adjustable wand, with your 25 or 40 tip and just don't turn wand so much that the chem comes out, to rinse. No need to go back and forth to truck. I DS through 200 feet of hose at 8gpm. It takes exactly 10 seconds for the water to go from applying chem to clear water or vice versa. I just change my tip about 10 seconds before I don't need chem or do need it. Average 2500-3000 sq ft take less than 5 gallon of HW mix.