Solent Maintenance DW25 de-ionised water is suitable for a variety of applications. It can be used in lead-acid car batteries and domestic appliances like steam irons and steam cleaners, preventing scaling issues. It's also effective as a final rinse in car washing to avoid spotting and for rinsing scientific glassware. De-ionised water initially has a neutral pH of 5.5, but this can change as it absorbs carbon dioxide from the air, forming carbonic acid. Boiling the water will remove the dissolved carbon dioxide, restoring its neutral pH. This product is supplied in a 25-litre drum.