Quick Answer
To determine the right diverter for your roof size, consider the roof's collection area and the desired flow rate. Measure the roof's square footage to calculate the total collection area. Look for a diverter that can handle 3-6 gallons per minute (gpm) for a typical household.
Calculating Roof Size
To calculate your roof’s collection area, multiply its length and width in feet and convert the result to square feet. For example, a 12’ x 20’ roof measures 240 square feet. When choosing a diverter, consider the desired flow rate, which depends on household use. For a typical household, a 3-6 gpm diverter is sufficient.
Choosing a Diverter
When selecting a diverter, consider a first flush device that captures the initial flow of water after a rain event, removing debris and contaminants. This typically includes a 10-20 gallon capacity for the initial flush cycle. Look for a diverter that integrates with your roof size and flow rate requirements. A common example is a 1" inlet and 1.5" outlet diverter for a 240 square foot roof.
Diverter Installation Considerations
During installation, ensure the diverter is level and securely attached to the roof. Consider factors like pipe size, material, and angle to prevent clogging and ensure optimal flow. For a 240 square foot roof, a 1" inlet and 1.5" outlet pipe combination is a common choice.
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