What is the maximum duration PEX piping can be exposed to sunlight?

PEX piping, which is known for its flexibility and resistance to corrosion, has specific limitations when it comes to exposure to sunlight. Prolonged exposure to UV rays can degrade the material, affecting its performance and longevity. The maximum duration for which PEX piping can be exposed to direct sunlight is 30 days.

This time frame is critical because UV rays can break down the molecular structure of the PEX, leading to potential failure of the piping material. After 30 days in direct sunlight, the risk of damage increases significantly, which is why manufacturers recommend that PEX be either installed in a manner that it is not exposed to UV light or covered with an appropriate protective barrier if temporary exposure is unavoidable.

The other durations listed exceed this exposure limit, which could compromise the integrity of the PEX. Thus, knowing the maximum duration of sunlight exposure helps ensure that the longevity and proper function of PEX piping are maintained.