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Wall thickness in plumbing refers to the thickness of the tubing or pipe walls, which determines the strength, pressure rating, and durability of the pipe. Thicker walls provide greater resistance to pressure, making them suitable for high-pressure applications like water supply lines or gas lines. Wall thickness is an important factor in selecting the right pipe material and schedule, as it affects flow rates, pressure loss, and compatibility with fittings. Proper measurement and specification of wall thickness ensure that the plumbing system meets design requirements and complies with safety standards.

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