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Do I Have to Use Red for Hot and Blue for Cold?
PEX supply comes in red and blue colors to help you keep track of the hot and cold lines. You can use white PEX supply for everything if you prefer.
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Is PEX Reliable?
PEX supply has been used for decades in other countries, where there are thousands of homes with 30-year-old, leak-free PEX. Most of the problems with PEX supply systems (in the United States and elsewhere) have been caused by sloppy installation or faulty fittings rather than the tubing itself.