When you need a pump for low-pressure spraying applications, select this Hypro 4101C & PowerPro 2.5 HP Engine Assembly. Installing it in your agricultural, pest control or water wash-down sprayer system gives you a maximum pressure of 100 PSI and an upper flow rate of 8.9 GPM. Choose a cast iron housing for standard use, or the Silvercast version if you need better protection against corrosion damage.