Two years ago my wife and I purchased an 1873 Mansard Colonial. Over the last 18 months we've done a great deal of work to it. As part of the rehab, my plumber ran new 1 inch Pex (Uponor) to the cast iron radiators. For reasons that remain unclear, he stubbed out one of the rooms in Pex rather than copper or cast iron. My question- would anyone like to weigh in on how to make the connection to the cast iron radiator look good? These are highly decorative radiators and the thought of having pex showing or a chrome sleeve adjoining brass makes my stomach turn. Any pics or advice would be greatly appreciated. Final note- the plumber is no longer on the project and I would like an idea of how it should be done before getting someone in here to finish the job.

Many thanks!