HANDLING AND STORAGE OF DEIONIZED WATER

The highly efficient solvent, water, has a high dielectric constant and water molecules have the ability to share or donate electrons. The capability of water to act as a solvent is increased as dissolved minerals, elements and electrolytes are removed through the deionization process. As a result, any transfer or storage of deionized water must be accomplished with materials that will not dissolve and/or contaminate already treated water.
Most commonly, deionized water is piped in materials such as ABS, PVC, polypropylene, stainless steel or glass. Pressure vessels and storage tanks are usually made of stainless steel or fiberglass (vinyl ester resin being the most common). Adequate care must be taken to ensure that no other materials are used in pipe fittings, valves, floats, etc.
More over, it is also advisable to seal or cover any storage tanks to prevent contamination of the treated water with any materials or substances found in a manufacturing or processing zone. It is recommended that a filtered vent be provided at the top of the storage tank to exclude contaminants from the tank during draw-down.