Just wondering if anyone had any ideas on this?
The other day, I put the central heating on for the first time in about 6 months. The radiators did not get hot and within a few minutes the boiler started making a very high pitched noise and then the DHW feed pipe ruptured at a soldered joint and started spraying water. Upon further investigation the copper pipe leading to the DHW turbine/flow sensor appears to have some type of metal pin piercing the pipe from which water is also leaking.
I have had several plumbers look at it and they will be replacing the failed components but none of them can explain what the pin is, where it has come from or what the underlying cause of the failure is. They all say they've never seen anything like this before.
Can anyone identify this pin, why it was sticking out of the pipe and what may have caused this failure? I have attached images that might help.
The boiler is a Worcestershire-Bosch 24Si II
Many thanks for your help