Burn Resistance


Corzan Piping Systems are self-extinguishing. When exposed to fire, Corzan Piping Systems will develop a char but will not worsen the fire by continuing to burn after the flame is removed. This is because Corzan has a limiting oxygen index (LOI) of 60, meaning that it requires 60% oxygen in the air to sustain a flame. Other non-metallic plumbing materials have an LOI of less than 20, meaning they burn easily and sustain a flame in normal air.

Toxicity of Combustion By-Products

Third party laboratory testing of inhalation toxicity using the New York State Modified Pittsburgh Protocol shows that CPVC is no more toxic than a campfire. The Biological Services Division of the United States Testing Company, now SGS, confirms that the smoke from burning CPVC is comparable to the smoke from Douglas Fir wood. Caution: Inhalation of smoke from a building fire is never recommended. While CPVC will not significantly add to the toxicity of a building fire, other building products can produce more harmful smoke.

Installation Hazards

Corzan Piping Systems are joined using a solvent welding process meaning there will be no need for torches or flames during the installation. Copper tubing generally requires the use of a flame to solder joints, which creates a significant hazard during construction. In some cases that hazard requires a fire watch be present on the jobsite, adding cost and complexity to the work. If for any reason a fire is needed for other work on your project, you can trust the fire resistance of Corzan pipe and fittings to minimize the risk of plumbing pipe ignition.

Contact Corzan

Field sales reps are stationed regionally throughout the country and are available to help you find products and resources in your area. Questions? Connect with a sales rep by completing the form below.