A method for connecting two coupling parts of a subsea coupling arrangement to each other

A method for connecting a first coupling part (1 a) and a second coupling part (1b) of a subsea coupling arrangement (1) to each other, the first coupling part being provided with at least one sealing surface (12a) which is adapted to abut against a corresponding sealing surface (12b) of the second coupling part to form a watertight seal between the coupling parts. Said sealing surfaces are brought into contact with each other by displacing the coupling parts towards each other. Filtered sea water is fed through a channel (25) in one of said coupling parts and into a space (14) between the coupling parts during said displacement of the coupling parts towards each other, said filtered sea water being discharged from said space and into the surroundings while flowing over said sealing surfaces to thereby prevent particles and dirt from being trapped between the sealing surfaces.