Package type SCAM-RO units are very easy to install. They are pre-assembled on a sturdy frame and include:" First filtering system;" Chemical pre-treatment;" Second mechanical pre-filtering system (up to 5 ?);" High pressure pumps;" Electric panel for instruments and controls;" Salinometer, flow captor, relief and regulating valves;" Semi permeable membrane system;" Flow indicators, pressure gauges, alarm system;" Instruction manual.