HG 7510 - SWR Passive Drain-Weir
The Stormwater Retention Passive Drain - Weir is used to control the flow of rain water off a roof. Trapezoidal weirs reduce the volume of water to the leader and are adjustable to provide various flow rates as required.
Specific to this product, it:
allows for fewer roof drains with smaller diameter piping because every roof becomes a temporary storage reservoir
lightens the load on sewer systems, reducing the possibility of flooding and consequent backflow
provides for efficient drainage of rainwater and prevents debris from entering the drain line
is available with 1 to 4 trapezoidal weir openings to meet varying flow rate requirements