A tap off for use in a mixer comprises a pair of cylindrical portions, with a first cylindrical portion extending in a direction that will be inward toward a mixer when the tap off is mounted on a mixer. The first cylindrical portion defines a first port inlet and communicates into a second cylindrical portion. The second cylindrical portion defines a second inlet port and an outlet port for combining air from both the first inlet and the second inlet port. The first and second cylindrical portions are fixed together. A pair of diverter plates have a face for deflecting air from the second inlet port in the inward direction, and further have a leg extending from the face into the first cylindrical portion. Tabs on the face and legs of both diverter plates extend into slots in the second cylindrical portion. The tabs extends into slots in the first cylindrical portion. A mixer, and an ECS pack are also disclosed.