Leading Force in Water Purification on the African Continent Established in 1994 as H2O International South Africa, we are without a doubt the industry leading force in water purification on the African continent. Today, we are known as H2O|BWT and with a team of passionate Head office staff and franchisees. H2O|BWT has a proven track record for many years of unmatched expertise and product range stretching not only throughout South Africa, but also into Namibia, Botswana, Mozambique, Lesotho and Zambia.