The Ontario Building Code | Class 4 Sewage Systems
8.9.2.3. Class 4 Sewage Systems
(1) Every Class 4 sewage system shall be operated in accordance with the literature required by Sentence 8.6.2.2.(6).
(2) No person shall operate a treatment unit other than a septic tank unless the person has entered into an agreement whereby servicing and maintenance of the treatment unit and its related components will be carried out by a person who,
(a) possesses a copy of the literature required by Sentence 8.6.2.2.(6), and
(b) is authorized by the manufacturer to service and maintain that type of treatment unit.
(3) The person authorized by the manufacturer to service and maintain the treatment unit and who has entered into the agreement referred to in Sentence (2) with the person operating the treatment unit shall notify the chief building official if,
(a) the agreement is terminated, or
(b) access for service and maintenance of the treatment unit is denied by the person operating the treatment unit.
In Plain Language
Class 4 sewage systems, a more advanced treatment type, have specific maintenance requirements set out in this article addressing their particular monitoring and upkeep needs.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.