The present invention describes a filter fastening system 1 comprising a filter socket 2 and a filter locking unit 3, wherein the filter socket 2 has a first end 4 being a top end and a second end 5 being a bottom end and a longitudinal body 6, wherein the filter locking unit 3 comprises a locking arm 7 with a connection end 8 and a locking end 9, a stopper 10 and a connection 11 where the connection end 8 of the locking arm is fixated with a joint 12 so that the locking arm 7 is pivotably arranged in the filter fastening system 1 so that the filter socket 2 may be fastened by pivoting the locking arm 7 until the bottom end 5 of the filter socket 2 is tightened against the stopper 10 and the top end 4 hence is tightened and sealed against a water piping connection for the filter socket (2).