Inner drains are resistant to freezing but can require careful maintenance to prevent problems.
Roof drain section.
22 13 19 13 sanitary drains.
Browse companies that make roof drains and view and download their free cad details revit bim files specifications and other content relating to roof drains as well as other product information formated for the architectural community.
Design and installation of roof drainage systems shall comply with section 1503 of this code and sections 1106 and 1108 as applicable of the international plumbing code.
Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs.
The main benefit of inner drains is that the system is hidden from view.