RomoTech Domed Tank 16 Gal (Black)
The 16-gallon domed tank in opaque black, for outdoor use where blocking light keeps algae down.
Amazon $157.99$157.99
The RomoTech Domed Tank 16 Gal (Black) and the Legacy 5-Gallon Stackable Water Tanks, 4-Pack are evenly matched, rated 2.9 and 2.9. The RomoTech Domed Tank 16 Gal (Black) leads on potable claims. The Legacy 5-Gallon Stackable Water Tanks, 4-Pack wins on value and features. The Legacy 5-Gallon Stackable Water Tanks, 4-Pack costs $30.99 less ($127 vs $157.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Legacy 5-Gallon Stackable Water Tanks, 4-Pack
For a first emergency-water stash of small, stackable tanks that one person can carry.
Amazon $127$127
Which should you buy?
- Choose the RomoTech Domed Tank 16 Gal (Black) for potable claims (NSF certified, food-grade, BPA free vs food-grade, BPA free).
- Choose the Legacy 5-Gallon Stackable Water Tanks, 4-Pack for value ($6.35 per gallon ($127, 20 gal) vs $9.87 per gallon ($157.99, 16 gal)) and features (spigot included, stackable vs 0.8 in. outlet fitting, UV resistant).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every under 25 gallons water storage tank; a clear win is highlighted. How we rank explains each one.
| Factor weight | RomoTech Domed Tank 16 Gal (Black) | Legacy 5-Gallon Stackable Water Tanks, 4-Pack |
|---|---|---|
| Overall rating | 2.9/5 | 2.9/5 |
| Value 40% | 11 $9.87 per gallon ($157.99, 16 gal) | 36 $6.35 per gallon ($127, 20 gal) |
| Potable claims 25% | 100 NSF certified, food-grade, BPA free | 50 food-grade, BPA free |
| Features 20% | 55 0.8 in. outlet fitting, UV resistant | 65 spigot included, stackable |
| Warranty 15% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| RomoTech Domed Tank 16 Gal (Black) | Legacy 5-Gallon Stackable Water Tanks, 4-Pack | |
|---|---|---|
| Capacity | ||
| Total capacity | 16 gal | 20 gal |
| Containers | 1 tank | 4 containers |
| Size (each) | 22 x 16 x 17 in | 12 x 10 x 15 in |
| Empty weight (each) | 10 lb | - |
| Water safety | ||
| Material | MDPE | Plastic |
| NSF certified | Yes | - |
| Food grade | Yes | Yes |
| BPA free | Yes | Yes |
| Features | ||
| Spigot or outlet | 0.8 in. outlet | Included |
| Stackable | No | Yes |
| UV resistant | Yes | - |
| Made in USA | Yes | - |