Function International Public Company Limited engages in manufacturing, importing, and wholesaling water purifiers and water systems in Thailand and internationally. It offers household water purifiers, water purifier RO systems, and water filters; commercial water purifiers, water dispensers, water vending machines, and water makers; industrial RO systems and tanks; and pumps and valves. The company sells its products under the Aquatek, Star Pure, Hydro Max, Treatton, Unipure, Fast Pure, BIO MAX, Dosag Pump, Ultratek, CNP, HP Watermaker, PENTAIR, RUN-XIN, SUEZ, and VONTRON brands. Function International Public Company Limited was founded in 1997 and is based in Khlong Sam Wa, Thailand.