Quick Answer
Choose a location for a first flush diverter that is near the roof's edge, ideally within 12 inches of the downspout, to minimize pipe runs and reduce the risk of debris accumulation.
Location Considerations
When selecting a location for a first flush diverter, consider the roof’s pitch, gutter size, and downspout configuration. A steeper roof pitch can increase the flow rate, but may also lead to debris accumulation if not properly managed. A minimum of 2x6 inches (51x152 mm) gutter size is recommended for efficient water collection.
Installation Distance and Pipe Sizing
Install the first flush diverter within 12 inches (305 mm) of the downspout to minimize pipe runs and reduce the risk of debris accumulation. Use 1-1/2 inch (38 mm) or 2 inch (51 mm) Schedule 40 PVC pipes for the diverter and downspout connections, which can handle typical flow rates of 0.5-2.5 gallons per minute (1.9-9.5 liters per minute). Ensure the pipes are securely fastened to the roof and wall to prevent leaks.
Maintenance Access and Inspection
Position the first flush diverter for easy maintenance and inspection. A location with direct access to the diverter and downspout connections can facilitate regular cleaning and debris removal. Consider an easily removable cover or access panel to simplify maintenance tasks.
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