Roof Drain Calculator
Roof Drain Calculator | Calculate Drainage Flow & Pipe Size Roof Drain Calculator Professional Sizing for Stormwater Drainage Systems Total Roof Area (sq. ft.) Enter the footprint area of the roof being drained. Please enter a valid positive area. Rainfall Intensity (inches/hr) Based on local 100-year, 60-minute storm data (usually 1-6 in/hr). Enter a valid … Read more