Pure Aqua, Inc. designs and manufactures water treatment systems in addition to commercial seawater RO system. In May 2012, Pure Aqua successfully manufactured and supplied a commercial seawater RO system to a major sea navigation company in Canada. The system came complete with a microprocessor control panel along with pretreatments consisting of a multimedia filter and antiscalant dosing systems. The SW-2.1K-204 system was designed to produce 2,100 GPD at a maximum 42,000 PPM feed water TDS. For more information click here: http://www.pureaqua.com/commercial-seawater-reverse-osmosis-swc-series.html