Exchange based-water treatment

A method for treating water in an exchange-based water treatment system, the system including:

• an input pipe to carry city water;
• an ion exchange vessel mechanically coupled to the input pipe, the ion exchange vessel to receive the city water, the ion exchange vessel to produce treated make-up water from the received city water, the make-up water being softened water, the make-up water being de-alkalized water;
• a cationic resin located within the ion exchange vessel, the cationic resin to soften the city water through a cationic exchange process, the cationic resin being a sodium zeolite resin;
• an anionic resin located within the ion exchange vessel, directly below the cationic resin, the anionic resin to de-alkalize the softened water, the anionic resin being a chloride-based resin;
• a valve located on the ion exchange vessel, the valve to control ejection of the treated make-up water from the ion exchange vessel;
• a make-up water pipe mechanically coupled to the valve, the make-up water pipe to carry the ejected make-up water;
• and
• a make-up water probe operatively coupled to the make-up water pipe, the make-up water probe to measure a level of total dissolved solids (TDS)
• a regenerant tank operatively coupled to the valve on the ionic exchange tank;
• and
• regenerant located within the regenerant tank, the regenerant being a salt, the regenerant to regenerate the cationic resin, the regenerant to regenerate the anionic resin,
• in which the method comprises the steps of:
• pumping the city water through said ion exchange vessel, said water flowing in a down-flow through said cationic resin and next through said anionic resin thereby causing depletion of said resins,
• and, after said resins are depleted, pumping city water in an up-flow through said anionic resin and next through said cationic resin;
• and
• pumping said regenerant in a down flow through said cationic resin and said anionic resin, whereby said resins are regenerated.