In plumbing, “schedule” refers to the wall thickness of a pipe, indicated by a number. Common schedules include Schedule 40, Schedule 80, and Schedule 120, with higher numbers indicating thicker walls. Thicker-walled pipes can handle higher pressure and are generally used for more demanding applications, such as industrial or high-pressure water lines. Understanding pipe schedules is essential for selecting the right pipes and fittings to meet pressure requirements, ensure proper flow, and comply with building codes.
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