A hydraulic interface configured to be installed between a windscreen washer liquid feed tube and a connector of a device for wiping a window of a motor vehicle is disclosed. The interface includes a body that defines at least one passage channel for the windscreen washer liquid, and at least one electric heating conductor that is disposed so as to heat said windscreen washer liquid, said body being configured to secure said conductor to said body by fitting together different parts of said body and/or by fitting to shapes made in one piece with said body.