ABC report Saturday 3rd December 2016..
Hundreds of thousands of homes across Australia are at risk of potentially dangerous gas leaks and fires due to the incorrect installation of multi-layer gas pipes outside houses, according to those in the industry.
They say the “ticking time bombs” are present in many new homes and apartments built in Australia over the past 10 to 15 years, especially in New South Wales and Victoria.
Forensic plumber Russell Kirkwood, who looked at thousands of homes over the past decade in his role with insurers and as a consultant, said he believed the vast majority of homes built during this period had the fault.
“This issue is a ticking time bomb,” he said.
“It will eventually effect thousands and thousands of people’s houses all across Australia.”
The yellow pipes, which have a plastic exterior and aluminium core, degrade when exposed to UV light.
They were considered safe if installed according to Australian Building Standards with an appropriate cover and had a lifespan of at least 50 years.
But pipes that were not properly protected were at risk of being damaged or breaking down quickly and leaking gas.
In extreme cases of high UV exposure, materials engineer Trevor Rowlands said they might only last years rather than decades.
“If there’s then a gas leak and it’s not detected … there would be a risk of a gas fire and in a worst case scenario potentially an explosion,” he told the ABC.
Mr Rowlands said a source of ignition such as a spark from a lawn mower, cigarette or naked flame could cause an explosion.
Depending on the proximity of any leak, the gas could also enter the house and make the occupants ill.
“This is a major safety issue,” Mr Kirkwood said.
Other people within the industry the ABC spoke with agreed the issue was a problem in Australia and posed a safety risk.
Extreme health and safety issue’
National regulators were considering banning the external use of the pipe altogether due to the level of non-compliance.
Energy Safe Victoria, which regulates the issue in commercial settings, said it had concerns about the installation in domestic homes.
“It’s clearly unacceptable, it’s non-compliance,” CEO Paul Fearon said.
“We wouldn’t say it’s widespread and systemic, but it’s certainly seems to be increasing.”
He had less of a concern about the safety risk.
“One could conceive of a circumstance where the supply is compromised and the remote chance there could be a safety issue,” he said.
Victorian Building Association (VBA) and Fair Trading NSW have told the ABC they do not believe the problem is widespread.
In a statement, the VBA said it conducted 5,617 audits on gas-related plumbing work and found just nine incidents of non-compliant work in relation to UV protection on gas pipework — none of which presented a health or safety risk.
However, when the ABC investigated homes at new housing areas in Melbourne’s west chosen at random, it found the exposed non-compliant yellow gas pipes were common — with some already degraded.
The ABC also saw correspondence from the VBA on a specific case of multiplayer pipe being exposed, in which its representative said: “If this pipe remains it could in the future pose an extreme health and safety issue.