Size of the Tank
Rainwater collection tanks come in several sizes. The size you’ll purchase should be directly tied to how much space you have and how much rainfall your area sees. You can find this information on rainfall maps.
Tanks typically come in three basic classifications:
- Small: Less than 2,000 liters
- Medium: Between 2,000 and 10,000 liters
- Large: Greater than 10,000 liters
Keep in mind that what you plan on using the water for can also impact the size of the system.
The number of occupants in your home and how much water you use each day should also be considerations as you make your selection.
All rainwater collection systems require regular maintenance. Your gutters need to be clean, and the filters that will be part of your system need to be regularly inspected and cleaned.
You’ll need to make sure that you are either capable of visually inspecting your system after each rainfall or that you have the means to hire someone to do so.
The CDC recommends that if you intend to use rainwater for drinking, it will need to be regularly filtered and disinfected. This includes the tanks themselves as part of regular maintenance.
You should also consider the cost of this project. While you will likely save on water bills, the collection system and installation can cost around $2,500 for the average 5,000-gallon dry tank system, according to FIXR.
Consider Rainfall Collection
Collecting and storing rainwater can let you water your lawn and garden in times of lower rainfall, and lower your water bills.
Many states encourage rainwater harvesting, but it’s not legal everywhere. Always check local laws before considering rainfall collection.
Do you harvest rainwater? Share your experiences in the comments!