"Pipe centres" are the distances between the centres of pipes that connect to radiators or other plumbing fixtures. It is usually measured in millimetres or inches. This measurement is significant when installing radiators, towel warmers and other similar fixtures because it ensures that the pipes are properly aligned for connection to the radiator valves.
For example, if you're installing a towel radiator, knowing the pipe centres will assist you put the plumbing connections on the wall so that they match the radiator's inlet and outlet points.
1200mm Wide towel rail pipe center details.
