I decided to go for a single 560 radiator, so I no more need these. I pressure tested these radiators to confirm their integrity and to detect any problems early. No pressure drop after pressurized to 0.6  bars and left for an hour. Back then I did not know that my warranty is transferable, so it seemed necessary ensure that the item is not faulty before I sell it.

My one year warranty IS transferable and expires expires on 13/03/2024.

Tech Spec