[Alvin1990]

I am doing a simulation for pipe flow to find out the head losses and I created an o grid hexa mesh(edge sizing and multizone). I generated the geometry in solidworks then imported it into spaceclaim and sliced it to many parts to do the meshing. Before importing it to meshing, I did new component and share to make the domain continuous. When I import the mesh to fluent there are many zones for each part. As shown in the attached image there are three zones for inlet. How can I merge them?(I have tried fuse and merge option but they give error)