CHLORINATED WATER alleged to affect Plastic drinking-water pipes …..IN ADDITION to joint-fittings de-zincifying

PEX Failures

With the sudden increase in the use of PEX in recent years, failures in PEX plumbing systems have been observed. Failures can be linked to two areas; the pipe and the fitting. The pipe can fail when exposed to chlorine within the water, or over exposure to sunlight before installation. In addition, PEX pipe has also been found to be permeable when exposed to some solutions, including oxygen and some petroleum products, and can leach toxic chemicals from the pipe material. As far as the fitting, the leading cause of failure in a brass fitting used with PEX is caused by dezincification. This causes the fitting to corrode and eventually create leaks.

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