Function International Public Company Limited and its subsidiaries manufacture and sell water treatment products in Thailand. Its offerings include household water purifiers, RO systems and filters, commercial water purifiers, hot-cool machines, water vending machines and watermakers, industrial water purifier TRT and FRP tanks and media, as well as pumps and valves. Products are sold under brands such as Aquatek, Star Pure, Hydro Max, Treatton, Unipure, Fast Pure, BIO MAX, Dosag Pump, Ultratek, CNP, HP Watermakers, Pentair, Runxin, Suez and Vontron. The company also rents factories and duty-free zones, was founded in 1997, and is based in Bangkok, Thailand.