D-Minaralization is based on latest cost effective ion exchange technique of counter current regeneration. The units consist of two corrosion free pressure vessels internally connected in series. The first column containing Cation absorbing exchanger and second column charged with an anion absorbing exchanger. The water flow Pass through the bed of a Cation exchanger then the bed of an anion exchanger and the systems remove dissolved salts from water to a specified degree. Regeneration require after using total exchange capacity. The Cation Resin is regenerated with an acid and anion resin is regenerated with alkali solution. RWT consists of acid/alkali proof pressure vessel with internal fittings and initial charge of Cation and Anion exchanger, set of regeneration equipment, hydraulic ejectors, acid and alkali tanks and conductivity meter to monitor treated water quality. These DM Plants offer a practical range of capacities and flow rates necessary to serve wide variety of applications. Standard Portable Deionisers Standard portable deionisers are Upflow two-bed type compact and simple to operate with conductivity meter to monitor quality of treated water continuously when in operation. Demineralisers Demineralisers can be connected directly to the Raw water and can used for continuous supply or instant requirement of demineralised water. By this process the, It can be passible remove of hardness as well as remove of all dissolve salts i.e;. FeCO3, CaCl2 . We can also say that demineralization or deionization is the process of removing the dissolved ionized solids from water by ion exchange. The major portions of total dissolved solids (TDS) are mineral salts, such as calcium bicarbonate, magnesium sulfate, and sodium chloride. Mineral salts are composed of cations and anions. Since deionization requires the removal of all ions, both the negatively charged anions and the positively charged cations, then materials capable of attracting both are required. These materials are known as cation and anion exchange resins.