| Compact Rain Barrel |
30–50 gallons (114–189 liters) |
UV-resistant polyethylene or recycled plastic |
Approximately 20–25 in. wide × 30–40 in. high |
15–30 lb (7–14 kg) |
Small gardens, balconies, patios, and limited outdoor space |
Lightweight, easy to position, and suitable for collecting water from a small downspout |
Lower storage capacity; it may fill quickly during heavy rainfall and usually requires an overflow outlet |
| Standard Rain Barrel |
50–65 gallons (189–246 liters) |
UV-resistant polyethylene |
Approximately 23–28 in. wide × 32–42 in. high |
20–35 lb (9–16 kg) |
Home gardens, flower beds, and general outdoor watering |
Balanced capacity, manageable footprint, and commonly compatible with downspout diverters |
Must be placed on a stable, level base; a full barrel can weigh more than 400 lb |
| Large Vertical Storage Barrel |
80–120 gallons (303–454 liters) |
Rotomolded polyethylene |
Approximately 28–36 in. wide × 40–55 in. high |
35–65 lb (16–29 kg) |
Larger yards, greenhouse irrigation, and extended dry periods |
Stores more water while using relatively little ground space |
Requires a strong foundation, secure overflow management, and sufficient clearance for installation |
| Horizontal Water Storage Tank |
100–300 gallons (379–1,136 liters) |
Heavy-duty polyethylene |
Varies by capacity; commonly 40–70 in. wide × 30–50 in. high |
60–150 lb (27–68 kg) |
Large gardens, utility areas, and properties with wider floor space |
Lower profile than tall tanks and convenient for gravity-fed or pump-assisted systems |
Needs a broad, level support surface; the filled tank is extremely heavy and difficult to relocate |
| Food-Grade Reused Drum |
Approximately 55 gallons (208 liters) |
Food-grade high-density polyethylene |
Approximately 23 in. wide × 35 in. high |
20–30 lb (9–14 kg) |
Budget-conscious non-potable rainwater collection |
Durable, widely available, and often less expensive than purpose-built storage containers |
Confirm previous contents, clean thoroughly, block light, and use only for appropriate non-potable applications unless a certified treatment system is provided |
| Collapsible Water Tank |
50–500 gallons (189–1,893 liters) |
Reinforced PVC, coated fabric, or flexible polymer |
Depends on capacity; footprint expands when filled |
Approximately 10–80 lb (5–36 kg) |
Seasonal use, temporary storage, camping, and locations where permanent tanks are impractical |
Lightweight when empty, easy to transport, and simple to store between uses |
More vulnerable to punctures and abrasion; the support area must be free of sharp objects and debris |
| Underground Cistern |
500–5,000+ gallons (1,893–18,927+ liters) |
Reinforced polyethylene, concrete, or fiberglass |
Varies according to tank capacity and excavation design |
Varies significantly by construction |
High-volume rainwater harvesting and properties requiring concealed storage |
Preserves outdoor space, reduces exposure to sunlight, and can provide substantial storage capacity |
Higher installation cost; requires excavation, filtration, access for maintenance, and professional planning in many locations |