Last revised in 2018, ASPE 45 is the only design standard that establishes the minimum performance specifications for siphonic roof drainage systems to help manufacturers, engineers, and inspectors properly design and test engineered siphonic roof drainage systems.
ASPE intends for this guide to be periodically updated to provide the latest innovations in Legionella and waterborne pathogen mitigation in building water systems and invites participation from all stakeholders.
ARCSA/ASPE/ANSI 78-2023 will assist engineers, designers, plumbers, builders/developers, landscape and irrigation professionals, state and local government, and end users in implementing a stormwater harvesting system while protecting public health and safety.