ASME A112.6.4-2022/CSA B79.4:22 PDF
This Standard specifies design and performance requirements for roof drains. This Standard applies to the following types of roof drains: general purpose, gutter and cornice, parapet and promenade, balcony, and deck.
This standard does not apply to siphonic roof drains covered under ASME A112.6.9/CSA B79.9.