When you need a high-pressure diaphragm pump, choose this Hypro Pump D1064GRGI. Ideally suited for ground and low-level spraying of liquid fertilizers, pesticides and herbicides, this high-pressure model rewards you with a maximum pressure of 725 PSI and an upper flow rate of 27.9 GPM. Furthermore, its assembly permits a companion gearbox and pressure regulator to be installed with it, allowing additional versatility with connection to a gas engine.