The Hypro GR40 Control Unit/Regulator is intended to mount directly on the Hypro D303 and D403 Diaphragm Pumps. This unit is capable of managing pressures up to 580 PSI and controlling flow rates up to 11 GPM. This high-pressure relief valve and control system is adjustable and includes a hose barb bypass, complete bypass lever, two-and-a-half-inch gauge, and half-inch hose barb terminals with individual shutoffs.