Condensate is an unavoidable result of air compression. It is a chemically aggressive fluid that mainly consists of water, but also contains oil and dirt particles. The cost of hazardous waste treatment is very high. The oil-water separator from GPS have been developed to reduce or eliminate the amount of oil in the condensate. Compressed air condensate must therefore be treated in accordance with water resource legislation to achieve prescribed safety levels before it can be disposed of in the waste water system.