







💧 Elevate your hydration game with compact, durable, and pure water storage!
The tankRO 3 Gallon RO Expansion Tank is a compact, high-quality water storage solution designed for reverse osmosis systems. Made from 100% food-grade materials with a post-cured diaphragm, it guarantees contaminant-free water. Its heavy-duty steel construction with precision welding and protective coatings ensures durability, while the included free tank ball valve and stand simplify installation. Sized to fit under most kitchen sinks, it supports up to 100 PSI and comes with a 1-year warranty, making it a reliable choice for clean, fresh water on demand.








| Brand | tankRo |
| Special Feature | RO |
| Product Dimensions | 22.9L x 22.9W x 35.6H Centimeters |
| Package Information | Can |
| Installation Type | Under Sink |
| Power Source | Corded Electric |
| Model Name | GTS3 |
| Upper Temperature Rating | 1E+2 Degrees Fahrenheit |
| Supported Water TDS Level Maximum (PPM) | 2000 |
| UPC | 653590999287 |
| Manufacturer | tankRo |
| Country of Origin | USA |
| Item model number | GTS3 |
| ASIN | B079YZ8THK |
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