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Builders have used copper in plumbing for many years. Copper, PVC (polyvinyl chloride), and PEX (cross-linked polyethylene) are the most widely used materials for residential plumbing.Each material has its own inherent benefits and drawbacks.Determining which is the safest type of plumbing depends on individual concerns and preferences.opper, PVC (polyvinyl chloride), and PEX (cross-linked polyethylene) are the most widely used materials for residential plumbing. Each material has its own inherent benefits and drawbacks.
PEX meets building code nearly everywhere, comes with a 25-year warranty, and puts a smaller hit on your budget than copper. For comparison, 100 feet of PEX costs less than $30. 100 feet of straight copper pipe costs about $285. PEX also may offer lower costs in terms of labor. For example, a home that requires two days of labor to re-plumb will only require a day with PEX.