Replacement fine filter for the Dennerle osmosis systems Compact 130 and Professional 190. You will notice whether the fine filter is blocked if the flow rate declines significantly. Please turn on the tap water and measure the volume of water flowing out of the outlet of the fine filter. Replace the filter if the volume is less than 1 liter/minute. The fine filter should generally be replaced once per year, more often in case of poor water quality.Do you have questions about this article ?