If you're facing a repipe decision, understanding the real differences between these two materials helps you ask better questions — not just take our word for it.
Copper has been the standard for decades thanks to its durability and heat tolerance. Its main long-term vulnerability is corrosion, especially in areas with certain water chemistry, which is the leading cause of slab leaks in older homes.
PEX (cross-linked polyethylene) doesn't corrode the way copper does, flexes to route around obstacles with fewer joints, and has become the standard in new residential construction.
Copper has a long, proven track record, natural resistance to UV and rodents in exposed applications, and some homeowners simply prefer it for that reason.
Your home's specific leak history, the age and condition of your current pipes, and your long-term plans for the property all matter more than a generic 'which is better' debate.
Modern PEX is certified for potable water and doesn't meaningfully affect taste for most homeowners.
Yes, this is common in reroutes and partial repipes, using approved transition fittings between the two materials.
Let's get you a real answer, not more guessing.