A Black Friday "deal" is often a normal price next to an inflated list price. Here a mini tank water heater only counts as on sale when its checked price is at least 15% below its own typical price over the last 90 days, from our price history. The best-rated models are listed too, since many are good value without a sale. See deals in every category.
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.
On sale now
No mini tank water heater rated 3.8 or higher is 15% or more below its typical price at the last price check (November 9, 2026). Prices are rechecked through the sales; this list updates when one drops. See the recent price changes.
Best buys at their normal price
The top-rated models in each size. A sale on one of these is worth more than a big discount on a weaker model.
Best 2.5 to 4 Gallon Mini Tank Water Heaters
- Ariston Andris RS 4 Gallon#1 of 10Full review
A 4 gallon plug-in tank at a 2.5 gallon price, with a six-year tank warranty. A strong pick for a kitchen sink.
Amazon $169.99$169.994 gal1,440 WPlug-in - EcoSmart ECO MINI 4#2 of 10Full review
An inexpensive 4 gallon plug-in tank for a kitchen or utility sink. Its warranty is a year shorter than the best small tanks.
Amazon $165.92$165.924 gal1,440 WPlug-in - Camplux ME40 4 Gallon#3 of 10Full review
A narrow 4 gallon plug-in tank that fits where wider tanks don’t. Its tank warranty is shorter than the major brands.
Amazon $209.99$209.994 gal1,440 WPlug-in
Best 6 to 10 Gallon Mini Tank Water Heaters
- GE 10 Gallon Point of Use#1 of 9Full review
A 10 gallon plug-in tank for a laundry, workshop or in-law kitchen, with an eight-year warranty. It sits on the floor rather than under a sink.
Amazon $279.65$279.6510 gal1,500 WPlug-in - Ariston Andris RS 8 Gallon#2 of 9Full review
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$209.998 gal1,440 WHardwired - GE 6 Gallon Point of Use#3 of 9Full review
A 6 gallon plug-in tank with an eight-year tank and parts warranty. The best all-round mid-size pick.
Amazon $240.86$240.866 gal1,500 WPlug-in
Best 12 to 20 Gallon Point-of-Use Water Heaters
- GE 18 Gallon Point of Use#1 of 5Full review
An 18 gallon plug-in tank with an eight-year warranty, for a small apartment, cabin or a washer far from the main heater. The best large pick.
Amazon $296.65$296.6518 gal1,500 WPlug-in - Ariston POU 20 Gallon#2 of 5Full review
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$351.5020 gal1,500 W- - VEVOR 18 Gallon Tank Water Heater#3 of 5Full review
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$219.9018 gal1,600 W-
