Upon customer request COT Oil Refiner System can also be equipped with a unique 3-micron filter with extra capacity to absorb temporary high intrusion of water and – of course – small solid particles. Preferably used when the main oil system runs irregularly and when the ambient environment contains significant level of humidity – with high likeliness of exposure to water. Since the COT Oil Refiner continuously removes water collected by the filter, there is no need for filter Changes due to water.