Flexible plastic water supply tubing that has largely replaced copper pipe in residential plumbing because it's easier to install.
Cross-linked polyethylene tubing widely used for residential and light commercial domestic water supply systems due to its flexibility, freeze resistance, and ease of installation. PEX comes in three types (A, B, and C) with different manufacturing processes and fitting systems. It can be routed through framing without solder, reducing installation time and labor costs.
The plumber ran PEX-A tubing from a central manifold to each fixture using a home-run layout, eliminating shared branch lines.
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