Ariston POU 20 Gallon
A 20 gallon, 120 V tank that fits under a counter, for a small apartment, cabin or in-law suite, with six years on parts and tank.
Amazon $351.50$351.50
20 gal1,500 W
2.4/5
An 18 gallon hardwired tank for a shower or washer. The GE 18 gallon costs less, plugs in and carries an eight-year warranty.
- 18 galTank
- 1,500 WElement
- HardwiredPower
Check price at Amazon$399.70
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Eighteen gallons, enough for a 20 to 25 minute shower by the maker’s figure
- Relief valve and separate drain port
- Low 25.5 in profile
Cons
- No published warranty
- Hardwired, and costs more than the plug-in GE 18 gallon
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 | ES2000 |
|---|---|
| Heating | |
| Tank capacity | 18 gal |
| Element | 1,500 W |
| Voltage | 120 V |
| Electrical connection | Hardwired |
| Thermostat range | 90 to 150 °F |
| Price per gallon | $22.21 |
| Installation | |
| Dimensions (H x W x D) | 25.8 x 19.2 x 19.2 in |
| Weight | 56 lb |
| Water connections | 3/4" NPT |
| Relief valve included | Yes |
Alternatives in this size
VEVOR 18 Gallon Tank Water Heater
A cheap 18 gallon tank for a shop, barn or utility room. With no published warranty, the GE 18 gallon is the safer buy for a home.
Amazon $219.90$219.90
18 gal1,600 W
Ariston POU 12 Gallon
A 12 gallon tank for a bathroom or kitchenette, with six years on parts and tank. Larger tanks cost little more.
Amazon $313$313
12 gal1,500 W
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