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Knowing the types of plumbing pipes in your home lets you take steps to prevent leaks, flooding, and potential health hazards. Polybutylene is prone to breakage, but it can be replaced with PEX, as it was here. Image: ilovebutter/Flickr.
DMV Piping. DMV copper pipe is a fourth type of tubing that is less commonly used. Its main use is on drains and it can also be found in old houses. It can be used also to vent plumbing fixtures, and should be used only in above ground applications. It has some yellow marks that help identify it from M type copper.