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 drain section.
22 13 19 13 sanitary drains.
The main benefit of inner drains is that the system is hidden from view.
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Download free high quality cad drawings blocks and details of roof drains organized by masterformat.
Inner drains are resistant to freezing but can require careful maintenance to prevent problems.