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Since a huge part of the world’s population is facing serious fresh water shortage, numerous researchers are working on efficient, cost-effective and environmentally friendly approaches for desalination of seawater (SW) and brackish water (BW) to overcome this problem. The article is focused on flow-electrode capacitive deionization (FCDI), which is considered as an advanced electrochemical desalination method. After reviewing its history, the components and materials used in this system were discussed in detail. The assembling process and the performance of the FCDI system were also addressed. In the end, a prototype of an FCDI system working in batch-mode was assembled. The system performance and the effective parameters on the system efficiency were also introduced by several experimental tests.