7.4.10.2.Hydraulic Loads for Fixtures

(1) The hydraulic load from a fixture that is listed in Table 7.4.9.3. is the number of fixture units set forth in the Table.

  (2) Except as provided in Sentence (1), the hydraulic load from a fixture that is not listed in Table 7.4.9.3. is the number
  of fixture units set forth in Table 7.4.10.2. for the nominal pipe size of the trap that serves the fixture.

                                                       Table 7.4.10.2.
                                Permitted Hydraulic Load from a Fixture Based on Size of Trap
                                             Forming Part of Sentence 7.4.10.2.(2)

                             Nominal Pipe Size of Trap, NPS          Hydraulic Load, fixture units
                                          1¼                                      1
                                          1½                                      2
                                           2                                      3
                                          2½                                      4
                                           3                                      5
                                           4                                      6

This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.