MULTI-LAYER COMPOSITE PIPE 

Flexible multi-layer PEX-aluminum composite pipes were introduced into the European market in the mid-1990s, initially for radiant floor heating applications. The main advantage of the composite, compared to standalone PEX, is that the aluminum layer acts as an oxygen barrier, a benefit in that specific application.

However, is this multi-layer material the ideal choice for plumbing installations too? Is it able to meet a number of critical requirements of a plumbing project, say, for instance, chlorine resistance and easy joining technology?

Proven Track Record in Plumbing

PEX pipe and fittings come from a family of polymers that have been used in plumbing applications for less than half that time, and are widely known for a history of poor reliability.

Multi-layer composite pipe made of PEX is not recommended for use if the water to be transported is at chlorine levels greater than 5 ppm.

Multi-layer PEX pipe will burn in everyday air just like a candle and will continue to burn on its own. Pipes will drip flaming plastic onto structures below, and in continuing to propagate the flames can be expected to worsen the overall property damages..

Multi-layer composite pipe made of PEX must be installed using costly brass fittings and a special compression tool for crimping. The steps of the process generally take two to three times longer, and even when properly assembled, the joints have been prone to failures.

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