CpVC and PVC plumbing for a house? Which has a longer life span?
The problem with PVC pipe is that it may have issues with leaks. It will degrade when exposed to UV light (such as sunlight), and also high temperature. Its pressure rating is to be derated at high temperatures. Because of this, PVC is not approved for use in houses for potable water.
CPVC is better for supply lines because it can take hot water. I go with Red here though, copper is best for supply lines. Use PVC on drains and copper for your supply lines. That is the best way to go.
PVC is good for drains. It's easy to work with, and easy to replace if something goes wrong. CPVC is more resistant to heat while also being more flexible. It costs more to make than PVC due to the added chlorination step of production. I don't usually see it in plumbing applications, but it's a common sight in plastic electrical conduits. I don't like it for conduits either except where encased in concrete. Protected from the elements, these materials can be reasonably expected to outlive the home in which they're installed. Neither of these materials is really suitable for use in a pressurized water circuit like your home's water supply. For that, you really should look at copper or barring that excellent first choice, PEX (crosslinked polyethylene) tubing.
