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Aokawa

4.0-Gallon Electric Mini Tank Water Heater, 1500W Instant Under Sink Hot Water Heater, Compact Point-of-Use Design for Kitchen, Bathroom, RV, Wall or Floor Mount, Adjustable Temperature

  • Based on 21 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Mar 26
Order within 15 hours and 25 minutes
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Style: 4.0 Gallon


Features

  • Upgraded 4.0-Gallon Tank Design Larger 0.1 thick stainless steel tank provides more hot water with longer lifespan; features LED temperature display, T&P safety valve, and 3-way diverter for dual-sink use.
  • Fast Heating & High Efficiency 1500W powerful heating element with upgraded L-shaped tube design heats water in 46 minutes, ensuring instant hot water on demand without long waiting times.
  • Easy Installation & User-Friendly Includes all accessories: T&P valve, 3-way diverter, hoses, mounting kit, and Teflon tape; compatible with 110120V power and 15A breaker for quick setup under sink. Maximum water pressure: 150 PSI. Product dimension: 14.25 " W x 13.85 " H x 12.25 " D.
  • Safe & Durable Construction ABS outer shell with seamless stainless steel inner tank; corrosion-resistant, waterproof, withstands up to 150 psi; Overheat and water pressure protection.
  • Adjustable Temperature & Wide Use Set temperature from 86167F with smart chip auto heat preservation; compact design supports wall or floor mounting; ideal for kitchen, bathroom, RV, and food truck.
  • Package Included: Teflon tape * 1, Converter hose * 2, Mounting kits * 1, Fine water pipe * 1, T&P valve * 1, 3-way valve * 1.

Brand: Aokawa


Capacity: 4 Gallons


Power Source: Electric


Product Dimensions: 14.25"W x 13.85"H


Special Feature: High Water Pressure Protection, Leak Detection, Overheat Protection, Pressure Release Valve, Temperature Lock See more


Brand: ‎Aokawa


Product Dimensions: ‎14.25"W x 13.85"H


Special Feature: ‎High Water Pressure Protection, Leak Detection, Overheat Protection, Pressure Release Valve, Temperature Lock


Color: ‎Black Gray


Wattage: ‎1500 watts


Voltage: ‎110 Volts


Maximum Temperature: ‎167 Degrees Fahrenheit


Maximum Operating Pressure: ‎150 Pound per Square Inch


Mounting Type: ‎Floor/Wall Mount


Is Electric: ‎Yes


Manufacturer: ‎Aokawa


Manufacture Year: ‎2025


Item Weight: ‎13.45 pounds


Item model number: ‎AT-40G-US01


Special Features: ‎High Water Pressure Protection, Leak Detection, Overheat Protection, Pressure Release Valve, Temperature Lock


Included Components: ‎Teflon tape * 1, Converter hose * 2, Mounting kits * 1, Fine water pipe * 1, T&P valve * 1, 3-way valve * 1.


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: September 18, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Mar 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Affirm Financing
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  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Water filled tank
Style: 2.5 Gallon
Works great one thing to remember is it needs to be close to sink facet to get instant hot water. I think the water filled tanks are better than tankless. I recommend water tank type.
Reviewed in the United States on December 1, 2025 by Catmandue
    • GREAT BUY
Style: 2.5 Gallon
Good buy Quick heat Easy hook up. I'll be buying more
Reviewed in the United States on October 20, 2025 by Robert Chantelau
    • It leaks at the pressure relief valve.
Style: 4.0 Gallon
This works well. 120 is the max temp needed for a sink or shower. 140 degrees is the max temp you need if you are connecting to a dishwasher. This water heater gets the water hotter than that so make sure you do not turn it all the way up. It’s super light. Surprisingly so. It comes with a tee in case you want to hook it to two fixtures such as a sink and shower or a sink and dishwasher. BUT it only has two hoses, so you cannot use the tee unless you buy an additional hose. I also had to buy an adapter for mine but you may not have to. I would have rather paid a little more but received a third hose to hook to the tee. But here is the biggest issue - the pressure relief valve leaks. I tried the teflon tape that came with it. I tried teflon tape combined with Pipe Thread Sealant. I tried thicker, better teflon tape with the sealant. I cranked it all the way down until the valve housing bottomed out. Nothing would stop the leak. Finally I ordered an assortment of rubber gaskets for an extra $9 to get what was either an 18 mm or 20 mm gasket (sizes weren’t labeled so I can’t be sure which) that would work in the valve fitting. Success! With the extra hose, the fitting, and the rubber gaskets, I now have hot water at my kitchen sink and dishwasher. Despite the extra expense and days of trying new solutions I only took off 1 star, because it really is great once you get it working. And if you don’t need to hook it to two fixtures then you don’t need the extra hose and adapter. ... show more
Reviewed in the United States on November 24, 2025 by I love quality.
    • Aokawa water heater
Style: 2.5 Gallon
I’m liking this little machine very much so far, though have only used it for about a week. So far, it performs as advertised and gives instant hot water in my kitchen sink. What a dream! Hope it will continue to function well.
Reviewed in the United States on September 25, 2025 by Jennifer Burch
    • Buy different sealing tape.
Style: 4.0 Gallon
Product leaked. Needed extra pipe tape to fix. The included tape is too thin to seal.
Reviewed in the United States on January 15, 2026 by Ron K.
    • Not worth the money.
Style: 2.5 Gallon
Purchased about a week ago. Except for a couple of small leaks (which I quickly fixed with more tape) installation was straight forward and simple. Product works as advertised, HOWEVER, due to my own ignorance of the basic laws of thermodynamics, I was shocked that I can only get about half a gallon of really hot water before the incoming cold water cools the hot water down precipitously. If I had anticipated this I would have paid the extra $30 to get the 4 gallon model. The wattage is the same and takes up just a little larger area. With all that being said, the product works as advertised. I do not recommend this and would encourage you to purchase the larger model. Can I get a return? Probably not because it works. I will try, though. ... show more
Reviewed in the United States on November 22, 2025 by Larry Johnson
    • Great but might be too big
Style: 2.5 Gallon
It looked great, light weight, hould be easy install, but would not fit under my sink.
Reviewed in the United States on September 20, 2025 by Michael G. Christy
    • Just the right size
Style: 2.5 Gallon
Love it works very nicely in my camper
Reviewed in the United States on September 22, 2025 by Nora J. Holt

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