Crystal Quest Commercial Reverse Osmosis. Three 4 x 40 TFC membranes. One 1.5 HP multistage pump and motor 110 or 220 volt 50 or 60 hertz and single phase. Frame is aluminum white powder coated corrosion resistant and light weight. One 4.5 x 20 5 micron sediment one 4.5 x 20 1 micron sediment and one 4.5 x 20 carbon block pre-filters. Two 2.5 0-300 psi panel mount gauges and two 1.5 0-160 psi top mount gauges. One low pressure switch - Safety device to protect the pump from running dry when there is insufficient feed water pressure. One solenoid valve with manual override. 110 Volt 60 hertz or 220 Volt 50 hertz. One 1/2 stainless steel needle manual flush valve - Regulates the product to waste ratio (system recovery). One computer controller. 110 or 220 volt with pre-treat lockout tank full contacts low pressure monitoring and alarm. One product water (0-10 GPM) and one waste water (0-10 GPM) flow meters. One panel mount TDS meter. One manual on/off.