There is disclosed a manifold (10) for conveying a sterilizing fluid inside empty articles (2) movable about an axis (A), comprising: a stator (25) stationary relative to axis (A) and defining at least one duct (26, 28) for sterilizing agent； a rotor (35) defining a second duct (40, 41) and a third duct (41, 40)； supporting means (60, 61) radially interposed between a first element (28) of stator (25) and a second element (37) of rotor (35)； and a mask (50) fluidly interposed between first duct (26, 28) and one (40) of second duct (40, 41) and third duct (41, 40) on the basis of the angular position of rotor (35) about axis (A), so as to prevent sterilizing agent from flowing inside one (40) of second duct (40, 41) and third duct (41, 40)； mask (50) is configured to allow sterilizing agent to flow from first duct (26, 28) to the other one (41) of second duct (40, 41) and third duct (41, 40) on the basis of the angular position of rotor (35) about axis (A)； first element (28) is radially internal to second element (37).
