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How should Distilled Water be Stored? – and Why?

Because of its unique physical characteristics distilled water needs to be stored very carefully. The reason being is the through time distilled water is liable to absorb levels of carbon dioxide from the atmosphere which will increase the levels of acidity in the water, eventually reaching pH levels as low as 4. Eventually, this level of acidity will preclude distilled water from being stored in any form of regular plastic, (PVC etc.).

 

If the distilled water is in reasonably small quantities then a reasonable compromise is for the water to be stored in glass bottles or containers. However glass containers can be acquire with capacities of up to up thirty liters which for the commercial user is hardly applicable.

 

Also it is a known fact that distilled water, once acidic will eventually dissolve glass, although the process will take years. For high bulk industrial storage purposes of storing distilled water there are a number of alternatives available each with their own pros and cons. Dependant on the level of purity required, some medium sized quantities of distilled water can be stored in stainless steel containers, which if constructed to any form of reasonable standard with professional welds, will provide an ideal but expensive storage facility for distilled water protected from all the forces that can cause it to deteriorate during storage including evaporation, the introduction or carbon dioxide and the buildup of alga in the water caused by exposure to sun light.

 

In recent years PVC containers have begun to be used fairly extensively in liquid container storage, although results have been less than encouraging for the storage of distilled water again because of a build up of carbon dioxide over time. Some companies that have made a commitment to PVC will overcome the problem by constantly re-circulating the distilled water though filters to reduce the CO2 levels.

 

In the last few years high density polyethylene (HDPE) tanks, drums and bottles, produced to strict 'food-grade quality' guidelines have become the number one alternative for storing distilled water in ideal conditions, over the long term and at reasonable cost. HDPE drums are guaranteed to provide high standards storage, which are strong enough to be totally resistant to most forms of impact, entirely corrosive proof and constructed in a one piece seamless method construction using food grade approved resin to ensure safe storage of distilled water.

 

**All of our distilled water is sold in HDPE containers**

 

Not only that, HDPE provides all of the conditions that are required for distilled water to be stored long term. That is limited exposure to light and the sun’s rays and at a cool temperature. The issue of storing distilled water, which can be an expensive commodity, should be taken seriously and will require a reasonable investment to maintain this product in the most ideal of conditions.