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ANY plastic pipe should NOT be exposed to ultraviolet rays. This makes the pipe weaker and breaks down the properties of the plastic.

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By Linda:

Typical allowed exposure time is 30-60 days, depending on the manufacturer's instructions. Some particular brands allow for longer exposure, but these are very rare and extremely expensive.

Under normal conditions, if the concrete is yet to be poured but the pipe is in place, use any possible means to cover the PEX. Cardboard, sheetrock, plywood (with no screws in it of course), insulation leftovers, etc.

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Radiant Designer at PexUniverse.com

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15y ago

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