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Fixtures not listed in Table 709.1 shall have a drainage fixture unit load based on the outlet size of the fixture in accordance with Table 709.2. The minimum trap size for unlisted fixtures shall be the size of the drainage outlet but not less than 11/4 inches (32 mm).
TABLE 709.2
FIXTURE DRAIN OR TRAP SIZE (inches) DRAINAGE FIXTURE UNIT VALUE
11/4 1
11/2 2
2 3
21/2 4
3 5
4 6
For SI: 1 inch = 25.4 mm.

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