Burst plastic piping.

[Bogart]

I had an experience of a Hep2O bursting in my place due to the boiler overheating. As the temperature rises the pressure it can stand drastically reduces. At above 80 odd degrees C the pressure it can withstand is less than 3 bar hence the pipe bursts before the prv operates.

 

[Ric2013]

3 bar at 80°C? Not according to the data I've looked at! Does Hep come in various types?

 

[king of pipes]

Heres what i have found

 

[Bogart]

Definitely looks like they have improved things since my burst, which was over 15 years ago.

 

[Dkdc71]

Looking at your photos if you have repaired the pipework you have no water in the system your 3 bar safety valve should be on flow from boiler as one of the posters has said it looks like overheating so it looks like steam you ate creating and bursting the pipework at the same point constantly what temp is your boiler at ?

 

[king of pipes]

Your system was installed in 09 has it been serviced and checked each year ? there is definitely a serious problem which needs sorting out this is a tell tale sign get a G3 engineer to do the repairs. Kop

 

[Welder]

There is no way the system has been serviced. The main PRV has zero marks on it to evidence it being pulled apart for the filter to be cleaned.
I'd also estimate the pressure vessel has failed too. Why, evidence around the tundish and it looks to me like there is too much weight in the vessel cause it to lean.
In my opinion, first port of call would be G3 to get it properly serviced PLUS send teh pipe section off to manu