1. Gather the needed items: A key or a coin, and a magnet (any magnet will do).
2. Locate your water service line: This will likely be in a garage, basement, crawl space, or utility closet. It should look something similar to the two pictures (below) and have a shut-off valve.
3. Test the material. If the pipe is metal, use the key or coin to scratch the pipe and hold the magnet to the scratch to see if sticks.
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