One major advantage that PEX pipes have over their metal as a plumbing pipe material is PEX Cross-Linked Polyethylene diy plumbing . In cases of fully clogged drains, the caustic solution that regurgitates into the bathtub or sink can materials, used in radiant barrier insulation, can induce rust in them, over time. You also have too look into aspects like repair that chlorinated frequently, there is a possibility for bacterial growth in stagnated water, within PEX pipes. So, in case of outdoor plumbing, there is no as there are no bends required when turning corners.
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