The Working Group responsible for revising ASPE/ANSI 45-2018: Siphonic Roof Drainage has completed their review of the standard, and the revision is now available for public review.

The ASPE 45 system design standard applies to engineered siphonic roof drainage systems intended to prime and operate full bore through proper pipe dimensioning and the use of siphonic roof drains. It establishes minimum performance specifications for systems, provides guidelines for inspection and testing, and describes the basis for the design of siphonic roof drain systems. This standard does not apply to conventional roof drains covered under ANSI/ASTM A112.6.4: Roof Drains, atmospheric roof drainage systems, or sanitary drainage systems.

Directly and materially affected interests wishing to comment on this revision are requested to do so by November 18, 2024.

To obtain a copy of the standard and the comment form, please contact ASPE’s Director of Communications, Marketing & Publications, Gretchen Pienta, at gpienta@aspe.org.

A notice of this public review was published in the Oct. 4, 2024 edition of ANSI Standards Action.