A plug-in tank needs no electrician: connect the water lines, fill the tank, then plug it in. Give it its own grounded outlet if you can, since a 1,440 to 1,500 W heater draws about 12 A, most of a 15 A circuit. Check that the cord reaches the outlet before you mount the tank.
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.
Best Plug-In Mini Tank Water Heaters: 2.5 to 4 Gallon
- 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 - Stiebel Eltron SHC 4#4 of 10Full review
A 4 gallon plug-in tank for a kitchen sink or as a booster on a long pipe run, with a six-year tank warranty. Cheaper 4 gallon tanks match its warranty and heat faster.
Amazon $239$2394 gal1,300 WPlug-in - ThermoMate ES400 4 Gallon#5 of 10Full review
A 4 gallon plug-in tank for a kitchen sink. Ariston and EcoSmart sell 4 gallon tanks for less with longer warranties.
Amazon $220.99$220.994 gal1,440 WPlug-in - GE 2.5 Gallon Point of Use#6 of 10Full review
A 2.5 gallon plug-in tank with an eight-year tank and parts warranty, the best-covered small tank here. Good for a single sink where you want it to last.
Amazon $205.26$205.262.5 gal1,500 WPlug-in - Ariston Andris RS 2.5 Gallon#7 of 10Full review
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$159.992.5 gal1,440 WPlug-in - Rheem Mini-Tank 2.5 Gallon#8 of 10Full review
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$218.992.5 gal1,440 WPlug-in - Stiebel Eltron SHC 2.5#9 of 10Full review
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.
Amazon $212.91$212.912.5 gal1,300 WPlug-in - ThermoMate ES250 2.5 Gallon#10 of 10Full 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$199.992.5 gal1,440 WPlug-in
Best Plug-In Mini Tank Water Heaters: 6 to 10 Gallon
- GE 10 Gallon Point of Use#1 of 6Full 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 - GE 6 Gallon Point of Use#2 of 6Full 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 - ThermoMate ES800 8 Gallon#3 of 6Full review
An 8 gallon plug-in tank short enough for an under-counter space. The warranty is short, and the Ariston 8 gallon costs less if you can hardwire.
Amazon $269.99$269.998 gal1,440 WPlug-in - Eemax EMT6 6 Gallon#4 of 6Full review
A wall-mountable 6 gallon plug-in tank with a six-year leak warranty. Good where floor space is short, though the GE costs less.
Amazon $280.02$280.026 gal1,440 WPlug-in - Camplux ME60 6 Gallon#5 of 6Full review
A 6 gallon plug-in tank with mounting hardware for a sink or utility area. Its tank warranty trails GE and Eemax.
Amazon $229.99$229.996 gal1,440 WPlug-in - ThermoMate ES700 6.5 Gallon#6 of 6Full review
A 6.5 gallon plug-in tank with a freeze setting for cabins and garages. GE sells a 6 gallon tank with a much longer warranty for about the same price.
Amazon $239.99$239.996.5 gal1,440 WPlug-in
Best Plug-In Mini Tank Water Heaters: 12 to 20 Gallon
- GE 18 Gallon Point of Use#1 of 1Full 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
