Drywell Calculator

Step 1:

Enter the Square Feet of Drainage Area 1 (Ex: Roof): This field is required.

Enter the Square Feet of Drainage Area 2 (Ex: Grass): This field is required.

Choose the Coefficient of Runoff for Area 1: Please select an option.

Choose the Coefficient of Runoff for Area 2: Please select an option.

Enter the depth of the gravel backfill beneath the Flo-Well (ft): This field is required.

Enter the thickness of the gravel backfill around the Flo-Well (ft): This field is required.

Press the Calculate button for results:

Runoff:

Volume of water to be stored:

# of Drywell Needed: