Siphonic roof drainage

Chicago — The American Society of Plumbing Engineers (ASPE) announced that the American National Standards Institute (ANSI) has approved ASPE/ANSI 45-2013: Siphonic Roof Drainage as an American National Standard.  ASPE became an ANSI-accredited standards developer in May 2012, and its first initiative was submitting ASPE 45, originally published in 2007, for approval as an American National Standard. The Read more