The ECO is a RODI system designed to meet the need of the Window Cleaning Professional for one operator and pole use. The ProTool ECO Water Pressure Powered with an astounding ease of use and transport. The ProTool ECO offers a full frame, value priced RODI system with 40in RO Membrane. The Carbon, DI Resin and RO filters are of industry standard design. The Carbon and DI Resin filters offer an easy spin off - replace - spin on replacement method.