SunEarth CopperStor Drainback Reservoir 7.5 Gal
SunEarth CopperStor Drainback Reservoir 7.5 Gal is backordered and will ship as soon as it is back in stock.
The SunEarth CopperStor DB-7.5 is a 7.5-gallon drainback reservoir designed for solar water-heating systems. Fabricated from spun-end seamless copper tubing with no ferrous metal components, it resists corrosion and allows direct sweated connections without dielectric unions.
High-temperature silver-brazed joints provide strength, while a 3/4-inch brass cap allows fill-level checking with a dipstick. The reservoir is finished with water-based matte black paint and wrapped in 1/2-inch Rubatex insulation to reduce heat loss and sound.
Key Features
- Seamless Copper Construction — Spun-end seamless copper tubing with no ferrous metal components.
- Direct Sweated Connections — Allows connections without dielectric unions.
- Silver-Brazed Joints — High-temperature brazed joints provide strength.
- 3/4-Inch Brass Cap — Allows fill-level checking with a dipstick.
- 1/2-Inch Rubatex Insulation — Helps reduce heat loss and operating sound.
- Matte Black Finish — Finished with water-based black paint.
Technical Specifications
| Specification | DB-7.5 |
|---|---|
| Manufacturer | SunEarth |
| Product Series | CopperStor |
| Model | DB-7.5 |
| Fluid Capacity | 7.5 gallons |
| Product Width | 18 inches |
| Product Length | 50 inches |
| Product Depth | 5 inches |
| Product Weight — Dry | 56 lb |
| Product Weight — Wet | 117 lb |
| Maximum Pressure | 160 PSIG |
| Connection Pipe Diameter | 3/4 inch |
| Construction | Spun-end seamless copper tubing |
| Joints | Silver brazed |
| Insulation | 1/2-inch Rubatex |
| Finish | Water-based matte black paint |
Product Highlights
- Drainback Compatible: Designed for use in solar drainback systems. Proper system design and installation support drainback freeze protection.
- Corrosion Resistant: Copper construction with no ferrous metal components.
- Installation Flexibility: Can be wall-mounted adjacent to a SunEarth HE tank or used with an external heat exchanger.
- System Compatibility: Designed for Cascade applications and other professionally engineered drainback systems.
Technical Documents
- CopperStor Drainback Reservoir Specification Sheet (PDF)
- SunEarth 2026 Product Catalog (PDF)
- CopperStor Warranty Information
Specifications are based on SunEarth CopperStor technical literature and are subject to change without notice.
SunEarth CopperStor Drainback Reservoir 7.5 Gal
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