7.4.10.5.Conversion of Fixture Units to Litres and Gal/min

(1) Except as provided in Sentence 7.4.10.3.(2), where the hydraulic load is to be expressed in litres, fixture units shall
     be converted as follows:
     (a) when the number of fixture units is 260 or fewer, the load is 2 360 L, and
     (b) when the number of fixture units exceeds 260, the load is 9.1 L for each fixture unit.

     (2) Where the hydraulic load is to be expressed in gal/min, fixture units shall be converted in accordance with
     Table 7.4.10.5.

                                                          Table 7.4.10.5.(1)
                                              Maximum Probable Drainage Rate, gal/min
                                                 Forming Part of Sentence 7.4.10.5.(2)

                                                  Fixture Units            Fixture Units            Fixture Units
                Fixture Units in Service
                                                      Col. 1                Col. 1 × 10             Col. 1 × 100
                          100                          53                       174                      900
                           90                          51                       164                      835
                           80                          49                       153                      750
                           70                          47                       140                      680
                           60                          44                       128                      600
                           50                          41                       115                      520
                           40                          38                       102                      435
                           30                          33                        88                      350
                           20                          27                        72                      262
                           10                          21                        53                      174

            Notes to Table 7.4.10.5.:
            (1) See Note A-Table 7.4.10.5.

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.