When selecting PEX (cross-linked polyethylene) pipes for underground applications, it is important to choose pipes that are specifically designed and approved for such use. Here are some commonly recommended types of PEX pipes for underground installations:
1. PEX-A (PEX type A)
PEX-A pipes are highly flexible and have excellent shape memory. They can withstand freezing and thawing cycles without compromising their integrity, making them suitable for underground applications.
2. PEX-AL-PEX
PEX-AL-PEX pipes have an aluminum layer sandwiched between two layers of PEX. This construction provides added strength and resistance to potential damage from external elements, making them suitable for underground use.
3. PEX-B (PEX type B)
While PEX-B pipes are generally less flexible than PEX-A, they can still be used for underground applications. They offer good durability and resistance to corrosion, making them suitable for specific underground installations.
It is important to check with local building codes and regulations to determine which types of PEX pipes are approved for underground use in your specific location. Additionally, consulting with a professional plumber or heating specialist can help ensure the proper selection and installation of PEX pipes for your underground application.