Galvanized steel was commonly used for water supply piping up until about World War II. It's still sold today, but its vulnerability to rust limits its use to retrofit projects in homes from that era. Today, copper is king and it's important to know the different grades and various fittings available for modern plumbing projects.

Water Supply Piping: Galvanized Steel Vs. Copper Explained

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How to Choose Water Supply Piping | This Old House

With increases in the price of copper piping, people are looking for alternatives, including chlorinated PVC and PEX. The latter is a more recent option introduced to the United States and gaining popularity due to its durability, affordability and ease of installation. It also offers a variety of options for joints and fittings.

Rising Copper Prices Make PVC and PEX Piping An Attractive Option

Once the water supply is shut off, decide how to fix a leaky pipe temporarily to prevent damage until a more permanent repair can be made. 

Find the exact source of the leak because pipe leaks in the middle of a straight run might use a quick-fix method that is different from what is needed near a pipe fitting. Discovering pipe leaks can be stressful but making a quick fix doesn’t need to be. 

For more tips on taking care of your home, see our Plumbing playlist: https://thd.co/2MhRi0Z

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Ask This Old House plumbing and heating expert Richard Trethewey demonstrates how and why frozen pipes burst. 

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This Old House plumbing and heating expert Richard Trethewey takes a look at the wide variety of water-supply pipes. 

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