Matt Risinger discusses PEX, copper, and CPVC. Specifically, he wants to know which is more efficient in terms of cost, labor, and durability. Copper lasts 75 to 100 years, unless you factor in rust and water hammering. CPVC is durable and flexible, not to mention it can stand up against chemicals including issues with well water. It's less expensive and lasts 50 to 75 years and it's in the middle in terms of installation time. Copper takes the longest to install and PEX is the simplest. PEX A is a little more flexible than PEX B and lasts 50 to 100 years. One thing to be cautious of is exposure to the elements," since PEX can't stand up to being outside for long. Watch the full video to learn the pros and cons of each.