Pure Aqua, Inc. designs and manufactures water treatment systems in addition to commercial seawater reverse osmosis packages. In April 2012, a commercial seawater reverse osmosis package was delivered to a major sea navigation company in Russia. The system came complete with a microprocessor control panel along with pretreatments consisting of a multimedia filter and antiscalant dosing systems. The SW-4.7K-504 system was designed to produce 4,700 GPD at a maximum 42,000 PPM feed water TDS. The system were selected from our SWC Series. For more information click here: http://www.pureaqua.com/commercial-seawater-reverse-osmosis-swc-series.html