Hypro D30 pump complete with 9910-GS40GI pressure regulator and gearbox for 5-6.5 HP engines with 3/4" shafts. Hypro medium pressure diaphragm pumps are recommended for spraying herbicides, pesticides, liquid fertilizers, and many other hard-to-handle fluids. Low-cost maintenance and almost wear-free operation make these pumps ideal for a wide variety of spraying jobs.