7.2.4.5.Assembled Pipe or Tubing

(1) Pipe or tubing assembled to comprise a standard drain waste and venting system shall be connected with drain,
  waste and vent fittings in conformance with Table 7.2.4.5.

                                                              Table 7.2.4.5.
                                                    Pipe Arrangement for DWV Fittings
                                                    Forming Part of Sentence 7.2.4.5.(1)

                                                                                           Fittings
               Pipe Arrangement
                                                                Acceptable                                    Type

                                                 LEGEND (DWV BRANCH FITTINGS)
                                               Vent pipe           –––––––––––
                                               Drainage pipe       ——————————
                                                 * Acceptable only if vertical run is of
                                                    3 inches size or larger and horizontal
                                                    branches are of 11/4, 11/2, or 2 inches
                                                    size
     1. Straight T                                                       6. Double Combination Y & 1/8 Bend or Double Long Turn TY
     2. Double T or Cross                                                7. Y
     3. Sanitary T or Short Turn TY                                      8. Double Y
     4. Double Sanitary T or Short Turn Double TY                        9. Double Waste Fitting
     5. Combination Y & 1/8 Bend or Long Turn TY

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.