I have wall that was removed by the previous owner of the home, but the plumbing was left in place. The cabinets were built around the small manifold and a drain. They had used it for a vegetable sink. I would like to remove this so I can floor over it and install new cabinet with out modifying them. There are 2 hot, 2 cold water lines and a 1 1/2" cast iron drain. One of the cold lines has a smaller white/clear plastic pipe passed throw it that goes to the manifold by the kitchen sink. It must have been some kind of repair. My question is can I move this manifold below floor level and cut this metal drain off and plug it?