True or False: Water distribution pipe may be sized under the UPC using fixture-unit load alone, without regard to the developed length of the pipe run.
Not quite. The answer is B: False
Sizing from Table 610.4 means picking the pressure range, then the length column at or beyond the developed length of the run, then reading down to a fixture-unit value that meets the load — so load and length are always used together. A longer run loses more pressure to friction at the same flow, and sizing on load alone is exactly the shortcut that produces an undersized branch on a long run.
Reference: UPC 2021 §610.8; Table 610.4 (Size of meter and building supply pipe using Table 610.4)
Checked against the official text
Checked against the 2021 UPC text. Washington's exam is written against the 2015 edition, which we have not read for this section, so confirm it against your 2015 book.
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