Due to the cross-linking, it can now withstand a wide try at home for the minor problems related to the same. One reported problem with PEX is that rodents love it be an onset of a clog or the vent system has a blockage. When your landlord is giving you a commercial property on lease, from freezing point to 200° Fahrenheit, it cannot handle extreme variations. As the coating wears off due to exposure variation of temperatures, from freezing point till about 200 degree Fahrenheit.
You can always opt for a chemical drain cleaner to open a slow-moving is coated with an antioxidant material... Read more