The UV systems ensure water used in the production processes remains free from microbial contamination, ensuring a high quality, pure final product. Seven units are installed at Massan and 18 at Gangwan.

In Massan the UV is used to treat clean-in-place (CIP) water (three units), cooling water injected after the CIP (three units), and activated carbon-filtered water (one unit). At the Gangwan plant three UV units are used to treat water after deaeration and the remaining 15 units treat activated carbon-filtered water.