Ariston Andris RS 8 Gallon
An 8 gallon tank for a kitchen or utility sink at a low price, with a six-year tank warranty. Plan on hardwiring it.
Amazon $209.99$209.99
The Ariston Andris RS 8 Gallon is the better mini tank water heater overall, rated 3.4 to 2.8. The Ariston Andris RS 8 Gallon leads on value, tank size and features. The Ariston POU 6 Gallon wins on warranty and heating power. The Ariston Andris RS 8 Gallon costs $73.88 less ($209.99 vs $283.87).
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.
Ariston POU 6 Gallon
A 6 gallon tank with six years on parts and tank, for a sink or booster you want to forget about. It costs more than plug-in rivals.
Amazon $283.87$283.87
Which should you buy?
- Choose the Ariston Andris RS 8 Gallon for value ($26.25 per gallon ($209.99, 8 gal) vs $47.31 per gallon ($283.87, 6 gal)), tank size (8 gal tank vs 6 gal tank) and features (relief valve included, wall bracket included vs relief valve included).
- Choose the Ariston POU 6 Gallon for warranty (6-year tank, 6-year parts vs 6-year tank, 2-year parts) and heating power (1,500 W element vs 1,440 W element).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 6 to 10 gallon mini tank water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Ariston Andris RS 8 Gallon | Ariston POU 6 Gallon |
|---|---|---|
| Overall rating | 3.4/5 | 2.8/5 |
| Value 30% | 70 $26.25 per gallon ($209.99, 8 gal) | 6 $47.31 per gallon ($283.87, 6 gal) |
| Warranty 30% | 56 6-year tank, 2-year parts | 83 6-year tank, 6-year parts |
| Heating power 15% | 20 1,440 W element | 29 1,500 W element |
| Features 15% | 60 relief valve included, wall bracket included | 35 relief valve included |
| Tank size 10% | 50 8 gal tank | 0 6 gal tank |
Specifications
| Ariston Andris RS 8 Gallon | Ariston POU 6 Gallon | |
|---|---|---|
| Heating | ||
| Tank capacity | 8 gal | 6 gal |
| Element | 1,440 W | 1,500 W |
| Voltage | 120 V | 120 V |
| Current | 12 A | 12.5 A |
| Electrical connection | Hardwired | - |
| Recovery (maker figure) | 6.8 gal/hr at 90 °F rise | 7 gal/hr at 90 °F rise |
| Thermostat range | 65 to 167 °F | 90 to 160 °F |
| Price per gallon | $26.25 | $47.31 |
| Installation | ||
| Dimensions (H x W x D) | 17.5 x 17.5 x 15.2 in | 15.8 x 13.8 x 13.8 in |
| Weight | 29.5 lb | - |
| Water connections | 3/4" NPT (adaptor included) | 3/4" NPT |
| Relief valve included | Yes | Yes |
| Wall bracket included | Yes | No |
| Warranty | ||
| Tank | 6 years | 6 years |
| Parts | 2 years | 6 years |