Water supply piping is what brings water to our homes from the main supply in the street. There are multiple types of water supply piping materials, including plastic, copper, lead and galvanized. The last two are the ones you want to watch out for.
Identify your water supply piping material by looking at the water pipes where they enter your home before the first shutoff valve. Depending on the home, they are often found in the basement. If the pipe has a threaded fitting or is showing signs of rust, you should have your water inspected as soon as possible.