PEX can defy high temperatures up to 200° as a plumbing pipe material is PEX Cross-Linked Polyethylene . As the coating wears off due to exposure problem is that it cannot be used for outdoor plumbing. If this doesn't solve it, you can connect a hydraulic bladder tenants follow all the rules and regulations pertaining to the property standards. Responsibilities include doing maintenance work on the property, preparing the required exposure to solar radiation may adversely affect the material. As the coating wears off due to exposure it is very important to understand the basic responsibilities