BWT AQA Smart Under-Sink

BWT (Best Water Technology) is the largest European water technology company, headquartered in Austria. The AQA Smart is their flagship residential under-sink system and brings a feature unique in the residential filtration market: magnesium enrichment technology.

Standard filtration systems remove contaminants. The BWT AQA Smart does that — but its ion exchange stage also enriches the filtered water with magnesium ions, which BWT positions as a health benefit (magnesium is a common dietary deficiency in Southern European populations). The cartridge contains a food-grade magnesium bed through which water passes after the carbon stage.

Filtration performance covers chlorine, chloramines, limescale, heavy metals, and sediment via multi-stage carbon block and ion exchange. It is not an RO system and does not remove PFAS to the same degree as RO or NSF-401 carbon systems. For Mediterranean households where the primary concern is taste, limescale, and general chemical reduction rather than deep contaminant removal, the BWT AQA Smart is a premium European-engineered choice.

The system uses a smart cartridge with an RFID chip that communicates remaining filter life to a companion app — a genuinely useful feature that prevents the "forgot to change the filter" situation common with most systems. Available through major European retailers and BWT's direct channels.