Ariston Andris RS 2.5 Gallon
A low-priced 2.5 gallon plug-in tank for a single sink, with a six-year tank warranty. It is the value pick among the small tanks.
Amazon $159.99$159.99
2.5 gal1,440 WPlug-in
2.7/5
A German-made 2.5 gallon plug-in tank for one bathroom or kitchen sink. It costs more than the imports but carries a six-year tank warranty.
- 2.5 galTank
- 1,300 WElement
- Plug-inPower
- 6 yearsTank warranty
Check price at Amazon$212.91
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Plugs into a standard 120 V outlet, so no electrician is needed
- Six-year tank warranty, longer than most small tanks
- Relief valve and wall bracket come in the box
Cons
- 1,300 W element is the weakest here, so it reheats slower than 1,440 W tanks
- Costs more per gallon than most 2.5 gallon tanks
The Stiebel Eltron SHC family
Every Stiebel Eltron SHC model we rank, smallest first. Ratings compare each against its own size.
| Model | Tank | Rating | Price |
|---|---|---|---|
| Stiebel Eltron SHC 2.5 (this one) | 2.5 gal | 2.7/5 | $212.91 |
| Stiebel Eltron SHC 4 | 4 gal | 3.5/5 | $239 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | SHC 2.5 (233219) |
|---|---|
| Heating | |
| Tank capacity | 2.5 gal |
| Element | 1,300 W |
| Voltage | 120 V |
| Current | 11.3 A |
| Electrical connection | Plug-in |
| Recovery (maker figure) | 18 min (maker figure) |
| Thermostat range | up to 140 °F |
| Price per gallon | $85.16 |
| Installation | |
| Dimensions (H x W x D) | 18.7 x 11 x 10.6 in |
| Weight | 15.9 lb |
| Water connections | 1/2" NPT brass |
| Relief valve included | Yes |
| Wall bracket included | Yes |
| Warranty | |
| Tank | 6 years |
| Parts | 2 years |
Alternatives in this size
Rheem Mini-Tank 2.5 Gallon
A slim 2.5 gallon plug-in tank from Rheem for one sink. It matches the Ariston on warranty but costs more.
Amazon $218.99$218.99
2.5 gal1,440 WPlug-in
ThermoMate ES250 2.5 Gallon
#10 in 2.5 to 4 GallonFull review
A compact 2.5 gallon plug-in tank with a freeze setting, suited to a cabin or garage sink. The warranty is short for the price.
Amazon $199.99$199.99
2.5 gal1,440 WPlug-in
Compare
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