Multi-Layer Composite Pipes (MLCP) are often touted as a cost-effective and flexible solution for residential plumbing. But how safe are they?
As the name suggests, Multi-Layer Composite Pipes aren’t made from a single material. They’re made up of materials such as polyethene and a layer of aluminium sandwiched in between.
MLCP pipes are often chosen for their supposed ease of installation. This can make them an attractive option for both homeowners and builders. In theory, the aluminium layer is there to provide structural integrity, but that benefit is quickly overshadowed by the effects a fire will have on plastic.
Are MLCP pipes safe in a fire?
However, it’s important to consider their performance in a fire. After all, the safety of your clients’ home and family should always be the top priority.
Recently conducted research by CuSP and an independent third party, Warrington Fire, has raised serious concerns about the fire safety of plastic pipes, including MLCP. The Plastic Under Fire tests simulated real-life fire scenarios to measure how different pipe materials respond when exposed to flames. One of the most worrying findings was how quickly MLCP pipes burn. The tests showed that MLCP pipes can burn completely in just over five minutes – barely enough time to safely evacuate a home or building in the event of a rapidly spreading fire.
The speed at which MLCP pipes burn is only part of the problem. When these pipes burn, they release a cocktail of toxic gases and fumes that can be incredibly dangerous. According to CuSP’s research, MLCP pipes produce significant amounts of carbon monoxide, a poisonous gas that can quickly lead to unconsciousness and death.
MLCP produces 248 times more carbon monoxide than copper pipes when burned for eight minutes. The tests revealed the presence of hydrogen cyanide, another highly toxic gas. Hydrogen cyanide can cause seizures, respiratory failure, and even death upon exposure.
To learn more about the specific health risks associated with the gases released by burning plastic pipes, including MLCP, visit The Health Risks of Burning Plastic. It’s important to be informed about the potential dangers lurking within your walls.
MLCP vs Copper, a Clear Difference in Fire Performance
When it comes to fire safety, the differences between MLCP and copper pipes are stark. Copper pipes simply don’t burn. Copper has a high melting point of 1,085°C, which means it can withstand the temperatures of most house fires without igniting or releasing toxic fumes.
This inherent fire resistance makes copper a much safer choice for plumbing systems. In the event of a fire, copper pipes won’t contribute to the spread of flames or release dangerous gases.
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Rebecca Spayne Managing Editor, International Fire Buyer
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