






| Design Considerations Important Statistics 1” Rain on 1 Square foot of catchment Area = .6233 Gallons Expect an 80% collection efficiency General Rule 1” Rain on 1sf = .5 Gallons |
| Design Considerations Calculating Collection Potential Roof catchment area 4000 SF .6233 Gallons x Season Rain x Sq Ft catchment area x 80% = Gallons per Season .6233 x 16.59 x 4000 x 80 = 33,089 Gallons |







| For more information please contact your Michigan, Ohio and Tennessee Distributor The Macomb Group Engineered Services dsavage@macombgroup.com |