Reverse osmosis water dispensers, hot and cold.

A reverse osmosis drinking water system pushes water through a membrane fine enough to hold back dissolved contaminants. The membrane in Minairal Pure systems is rated at 0.0001 micron, and it removes heavy metals and dissolved contaminants from the incoming water.

Reverse osmosis also removes minerals. Pure systems put four of them back, calcium, magnesium, potassium and sodium, through a mineral filter using Biocera technology from Korea. The water is then held in stainless steel tanks and dispensed hot or cold. Because the source is the water line, output is stable and does not depend on humidity or the weather.

The Pure Countertop sits beside a sink or on a counter, with 7 L stainless steel tanks. The Pure Floor is free-standing, with 13 L stainless steel tanks. Both draw only around 40 to 50 W while cooling, a few baht of electricity a month.

Both models share the same treatment: five-stage reverse osmosis, remineralisation, continuous UV-C sterilisation and internal recirculation of the stored water. The choice of format and number of units is made at the site assessment, from the volume and the space at each point of use.

On Pure systems the sediment and pre-filter is changed every four months. The post-carbon filter, the mineral filter and the reverse osmosis membrane are replaced every twelve months. TDS and pH are checked during routine maintenance, and water produced on site can be tested once a year by an independent ISO 17025 accredited laboratory as part of the business service plan.

Maintenance is carried out by Minairal technicians from service centres in Koh Samui, Phuket and Hua Hin, with coverage of Bangkok and Koh Phangan. Response time is 4 hours on average, Monday to Saturday, 9:00 to 18:00, in English and Thai.