Energy Recovery, Inc. is engaged in developing, manufacturing and selling of energy recovery devices and circulation pumps primarily for uses in seawater desalination plants that use reverse osmosis technology. The Company's products are sold under the trademarks AquaBold, AquaSpire, ERITM, PXT, Pressure Exchanger, PX Pressure Exchanger, PEIT, Pump Engineering and Quadribaric. The Company develops and sells two main lines of energy recovery devices: PX pressures Exchanger devices and turbochargers. Each line includes a range of models and sizes to address the breadth of required process flow rates, plant designs and sizes. The company has two wholly owned subsidiaries: Energy Recovery Iberia, S.L. and ERI Energy Recovery Ireland Ltd. During the year ended December 2011, the Company merged three subsidiaries including, Osmotic Power, Inc.; Energy Recovery, Inc. International and Pump Engineering, Inc. into the parent company, Energy Recovery, Inc.