A comment
In a private house, when replacing the heating system, I ran into a problem. It was originally tuned to aluminum radiators, but the guys said that because of the quality of our water, they won’t last long. Therefore, he took the GH VIERTEX A80-500 bimetallic, especially since the price is divine. And the manufacturer inspired confidence.
Mounted them without a hitch, I did not even think that everything was so fast. They look very good overall. I meticulously examined each, the colorful coating was applied qualitatively, there were no smudges or irregularities, the thread was smooth.
During the operation period there are no complaints, the house has become much warmer. I was afraid that they would not withstand the pressure drops, but in vain everything is fine. So I think that I was not mistaken in the choice, I hope they will last a couple of decades.
pros
price, attractive appearance, good heat dissipation, durability