Device and method for mounting of a lead-through means

A method for establishing an elongated ducting element in an installed position in an opening in a wall, said method comprising the steps of:

• providing a ducting element with a sealing component projecting on all sides thereof and arranging said ducting element into an installed position in which the sealing component bears against edges of the opening so that a sealing affect is provided between two sides of the wall;
• configuring the element so that a flexible section is provided behind the sealing component, said flexible section being adapted so that under the effect of a slight force applied anywhere along a longitudinal extent of a part at a front of the flexible section, the part at the front of the flexible section is displaced relative to an unloaded longitudinal extent thereof;
• providing the wall so that when viewed from a front face thereof and in the direction of ducting, a depression is established all around the opening so that the opening essentially forms the lowest point of the depression;
• and
• inserting a tip of the ducting element toward the depression in the wall, and due to the configuration of the element, the tip is guided toward and through the opening for establishing the installed position.