Stiennon & Stiennon
Method for providing existing building flat roof with drain restrictors
A relatively flat roof of a structure is provided with a restricted flow roof drain assembly. The roof drain assembly includes a roof drain extending through an opening in the roof for receiving water collected on the roof. The drain has a predetermined maximum flow rate capacity. A flow restrictor is set on the roof, and surrounds the roof drain. The restrictor has a dam including at least one aperture. The at least one aperture has a variable flow rate capacity which is less than the maximum flow rate capacity of the roof drain.
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additional additional inventional
James F. James S.
Mickowski Piskula