The Truma gas filter effectively protects regulators and valves against dirt and oil residues. This Truma product filters the gas and captures the oily substances, which are prone to accumulate in the gas pressure regulator and valves which in turn gradually clog up.  Thanks to its efficient filter cartridge, the Truma gas filter captures 99% of the oily particles. To achieve this  Truma uses an innovative patented filter technology for its product. "The filter cartridges can be exchanged simply. A saturation display indicates when they need to be replaced.  The Truma gas filter is installed in front of the gas pressure regulator and is suitable for all wall-mounted single or dual-cylinder gas pressure regulation systems. The product is approved for all EU countries. An efficient gas filter is particularly important in countries where the quality of the gas is lower.  This product from Truma is the ideal choice to protect the gas systems. The filter retains almost 100% of the aerosols thereby ensuring flawless functionality and the long service life of the systems.  With 1 Filter.