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ASME A112.6.3-2022/CSA B79.3:22
Floor drains
This Standard specifies design and performance requirements for floor drains, adjustable floor drains, and area drains that are used inside of, or adjacent to, building structures. Drains of outlet NPS-2 and smaller, intended only for installation in shower areas, are covered in this Standard and in ASME A112.18.2/CSA B125.2 as well.
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American Society of Mechanical Engineers [asme]