An embeddable device (11, 41) for passing conduits through a constructional component (6), includes a tubular housing (12, 42) having an attachment flange (14) provided at one of its ends for temporary securing the device on a formwork (7) of the subsequently cast constructional component (6), and a receptacle (15) for isolation means (8) and which surrounds, at least regionwise, an axially extending through-opening (16). A connection device (21, 44) connects a plurality of embeddable devices (11) with each other and includes at least one connection element (23, 24, 26, 27) provided on the housing (12) and extending parallel to a plane (E) defined by the attachment flange (14) at a distance from the plane (E).