Plumbing/Pipe Drawings, Continued
Each opening on a fitting is identified with a letter. On crosses and elbows,
you always read the largest opening first and then follow the alphabetical
order in figure 4-49. On tees, 45-degree Y-bends or laterals, and double-
branch elbows, read the largest opening first, the opposite opening next, and
the outlet last.
Figure 4-49 show the order in which you read fittings.
Figure 4-49.Plumbing fittings
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