8.6.2.1.Septic Tank Systems

(1) An effluent filter shall be installed in the outlet flow path of every septic tank that discharges effluent to a leaching
     bed.

     (2) The septic tank effluent filter required by Sentence (1) shall,
     (a) conform to the requirements of NSF/ANSI 46, “Evaluation of Components and Devices Used in Wastewater
         Treatment Systems,”
     (b) be sized to filter particles of 1.6 mm,
     (c) have a minimum area of 550 cm2, and
     (d) be installed in accordance with the manufacturer’s recommendations.

  (3) A secured access opening to allow for regular maintenance of the effluent filter shall be provided at the ground
  surface.

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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.