Most homes built in the past 10 years use CPVC feed lines for the water supply but many homes may have a mixture of copper and CPVC depending on the appliance or fixture that is being plumbed.
You are likely to see these transitions between the two different materials at your water meter, outside hose bibs, water heaters and even toilets and faucet feeds.
When making the transition you have two basic choices. You can install …