Mobile demineralizer

A mobile demineralizer, comprising a power driven vehicle, having a driver's area a set of primary demineralizing cylinders arranged together in an adjacent upright parallel configuration in said vehicle, a set of secondary demineralizing cylinders comprising a smaller number than said set of primary cylinders, arranged together in an adjacent upright parallel configuration in said vehicle, said primary and secondary cylinders each having a top inlet and a bottom outlet being individually detachable and containing a mixture of strong acid, strong base demineralizing resin, inlet means adapted to be connected to a source of raw water under pressure for supplying water to the inlets of said primary cylinders in parallel, a carryover pipe, means for connecting the outlets of said prmary cylinders to the inlet of said carryover pipe in parallel, intermediate probe means for producing an electrical output indicative of the concentration of ions in the water located in the carryover pipe, means for connecting the outlet of said carryover pipe to the inlets of said secondary cylinders in parallel, filter means for removing any of the demineralizing resin found in the water, means for connecting the outlets of said secondary cylinders in parallel to the input of said filter means, and discharge outlet means connected to receive the output of said filter means for providing a continuous supply of demineralized water, said continuous supply of demineralized water being maintained during removal and replacement of individual exhausted cylinders.