Burst plastic piping.

[Martin Dunne]

Hi all,

I have a recurring problem with my central heating system, the pipework from my boiler to the hot water tank keeps on bursting, it has occurred 3 times now. The pipe is 28mm Hep2o and it is physically splitting the pipe, not blowing off at the fittings.

The house is 9 years old and this is the 3rd time it has happened, always on the same piece of pipework, should there be some pressure relief to prevent the pipe from bursting as when it bursts it pretty much explodes.

Does anyone have an idea as to what the issue could be? Is it a defective peice of pipe or is there a fundamental problem with the system?

 

[Ric2013]

How close to the boiler is the pipe? In terms of metres or feet of pipe run.

 

[Martin Dunne]

The closest the pipe has burst is approx 4 metres from the boiler, the furthest is about 7 metres.

 

[Ric2013]

That isn't too close to the boiler.

If this is a sealed system there should be a pressure release dump set at 3 Bar, often incorporated in the boiler. Hep should be good for 6 Bar even at 90°C...

 

[Martin Dunne]

Yes it is a sealed system. Boiler is an ideal isans.

 

[Martin Dunne]

 

[oz-plumber]

If I were you, I would send the pics to the manufacturer of the pipe.

I would go as far as requesting someone from the manufacturers to come and inspect the pipe.

If this has happened on the same piece of pipe on 3 separate occasions, they will be interested in testing the pipe.

 

[Ric2013]

The same batch of pipe, or the same section within your installation?

I wonder if the PRV is seized?

 

[ShaunCorbs]

The same batch of pipe, or the same section within your installation?

I wonder if the PRV is seized?

Wouldn't be in the same spot tho every time

 

[Ric2013]

Yeah, presumably the OP has bought a length and keeps using this batch to repair the damaged section?