Radiator failures

[Reshweb]

I have had 7 Stelrad softline radiators start to leak around the weld where the elbow joins the radiator panel.

As part of a renovation I have replaced all the radiators and 90% of the copper pipe with Speedfit barrier pipe.
System is treated with Fernox F1 and has a Magnaclean Twin Tech filter which is checked annually when I top up the F1.
Water has been tested by Fernox and was OK.
Open vented system with a Worcester Greenstar 30CDi boiler (16 years old) heat exchanger replaced in Aug 2022.
Whether its coincidence I don't know but the radiator failures started after this work was completed.
The radiators that have failed have only been in service for between 8 and 5 years.
The radiators have all been purchased at different times so I don't think its a batch issue.

Any ideas ?

Thanks
Graham

 

[ShaunCorbs]

What did stelrad say ?

 

[Reshweb]

We have been given replacements under warranty by the merchants we purchased from.
No feedback following their returns to Stelrad.
I have not spoken to Stelrad directly yet.