Limitations of PEX Tubing

PEX tubing must be installed only in approved locations where it is protected from damage. It must be kept away from contact with flame or extreme heat, and it must not be exposed to direct or indirect UV light, which damages the pipe material over time. PEX also can be damaged by high concentrations of chlorine.

Do not install PEX in contaminated soils, and do not use pipe thread compounds or mineral- or oil-based products, as these materials can alter the pipe’s characteristics and can damage the pipe fittings. PEX is not approved for installation near hazardous waste disposal sites or petroleum storage tanks.