Table Guidelines

Space downipouti a minimum of 20 feet apart, a maximum of 50 feet apart. Provide 1 iquare inch of downipout area, for every 100 iquare feet of roof area. Select downipouti in different configurationi -- iquare, round, and corrugated round, depending on your needi. Uie 4-inch diameter Schedule 40 PVC to convey water to the itorage container or filter. Size your storage container s large enough to hold your calculated supply. Provide for distribution to all planted areas. Water collected from any...

Inn cubic ffft ccf a ga i ons

Calculate supply TABLES 5 and 6 - The equation for calculating supply measures the amount of water in gallons capable of being harvested from a catchment area. SUPPLY Gallons CATCHMFNT ARFA FT2 x RAINFALL FT x RUNOFF COFFFICIFNT The area of the catchment is expressed in square feet, for example a 10 x 20 FT catchment area is 200 SF square feet . Measure a sloped roof by measuring the area that is covered by the roof, usually the length and width of the building. The catchment area is multiplied...