BNQ - Holding Tanks

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Holding tank

Standard BNQ 3682-901
Prefabricated Sewage Holding Tanks for Residential Use – Dimensional and Physical Characteristics

Waste water treatment relies on structures designed to be solid, effective and safe. For that reason, the BNQ has developed a series of standards governing septic tanks, holding tanks and absorbing wells. In particular, standard BNQ 3682-901 specifies the dimensional and physical characteristics of prefabricated holding tanks for residential use in concrete, fiber-glass reinforced polyester or polyethylene. It applies to prefabricated holding tanks intended for underground installation to store water from low-flow or chemical toilets and household waste water from detached dwellings.

Download standard (French only)

Standards committee members

Certification Offer

Marque de certification - Fosses de rétention For a structure manufacturer conducting business in Québec, BNQ certification is an excellent calling card. The BNQ has therefore established a certification program to certify waste water treatment structures based on four documents, including the BNQ 3682-925 protocol. This protocol establishes the procedural rules and marking requirements applicable to the certification of prefabricated septic tanks to the requirements of BNQ 3680-905, prefabricated holding tanks to the requirements of BNQ 3682-901 and prefabricated structures for absorbing wells to the requirements of BNQ 3682-850.

This certification program is accredited by the Standards Council of Canada.

Download document required for certification

Certified businesses

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