Function of stage cartridge Stage Description Component Main Function 1st stage 5um PP Sediment Filter PP-10 Remove the particles, sand , dust and colloid etc. 2nd stage Granular Carbon Filter UDF-10 Remove the chlorine, odor, small outgrowth etc. 3rd stage Block Carbon Filter CTO-10 Remove the odor ,chlorine, , suspension 4th stage RO membrane FULLCOME or FCS or FILMTEC Remove the heavy metal ,harmful soluble solid ,bacteria, virus, other dissolved matter and chemical drug in the running water 5th stage Post inline Carbon Filter T-33 Adjust the taste for .pure water Home undersink RO water purifier SZCK-210 Description: 5 stage RO sytem Auto-flushing with Anti-dust cover Capacity: 50/75/100GPD Flush Type: Manual Flush Housing: 10" double "O" ring housing Fittings Type: JACO (can opt Push-in Quick Fittings) Diaphragm Booster Pump with Adaptor: 110V/220V, 50/60Hz Faucet: D -01 (As seen in the picture to choose ) RO Membrane: HID Membrane or FCS Membrane or FILMTEC Membrane Pressure Tank: 3.2G steel Tank Usage: Flushing Filters :When using pure water machine for the first time ,filter should be flushed as following step : Open the inlet water ball valve ,open RO bypass flush valve ,insert the plug of power supply in the socket of power ,booster pump starts work ,concentrate emission port begins to emission concentrate water .After flushing process is complete ,open diverter valve in pressure tank ,close RO membrane flushing ball and now begin to produce pure water ,at the same time concentrate emission flux dropped obviously . NW:14kg GW:16kg Packing:1pcs/CTN Packing Dimension: 41*35*58cm.