Hi, I hope this is of some interest. So far I can't get a sensible reason for the sudden burst. It is very close to a T junction. I could not work the brand as you see in the picture, there are lots of letter K. Then batch number, made in England. The pipe was installed 11 years ago. There are 4 main electric cables touching the pipe. But I don't see the heat generated from the current can affect the pipe.