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SHIWAKOTO 4 Gallon Under Sink Water Heater, 120V 1440W Small Hot Water Heater, On-Demand Hot Water for RV, Kitchen and Bathroom (Floor/Wall Mounted)

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Availability: Only 5 left in stock, order soon!
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Arrives Thursday, Apr 16
Order within 7 hours and 38 minutes
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Features

  • [Hot water in 1 second] Point of use water heater 120v (1440W) delivers hot water on demand, with adjustable temperatures ranging from 86F to 167F. It solves traditional tank waiting, so you wont waste power on prolonged preheating cycles. Dual outlets fit water heater electric needs, supplying 2 sinks non-stop (ideal for under sink hot water heater use in winter dishwashing/thawing)
  • [Energy-Saving Under Sink Heater] This portable water heater uses 0.787-inch polyurethane insulation to cut energy useno frequent reheating needed to maintain desired temperatures. Auto power-off at 194F protects the 120V electric water heater, building safety for home 4 gallon electric hot water heater use
  • [Instant Water Heater with IPX4] The RV water heater has IPX4 waterproof shell & 150 Psi resistance. As a compact under sink heater, it works stably in humid areas, it's suitable for compact bathrooms, RVs, or damp garages. Of course, using it in a dry environment can also effectively extend the lifespan of the portable instant hot water heater
  • [Compact Point of Use Electric Water Heater] This compact under sink water heater (14.9614.9612.8 inches, 22.49lbs) is a space-saving 4 gallon mini tank water heaterheat only the water you need, right where you need it. It supports wall/floor mountingperfect for small spaces such as under kitchen sinks, on RV walls, in bathroom cabinets, or under farm washstands, with no excess power used for unused capacity
  • [Kit for Small Water Heater] On Demand Water Heater 1, Plastic Expansion Tube 2, Fastening Screw 2, Bracket 1, T/P Valve 1, User Manual 1. Check the built-in magnesium rod yearly (key for fast heating electric tank heater durability)replace aged rods to avoid leaks

Brand: SHIWAKOTO


Capacity: 4 Gallons


Power Source: Electric


Product Dimensions: 14.97"W x 14.97"H


Special Feature: Durability, Ease of Use, On-Demand Hot Water, Safety and Protection Features, Temperature Control


Power Source: Electric


Special Features: Durability, Ease of Use, On-Demand Hot Water, Safety and Protection Features, Temperature Control


Wattage: 1440 watts


Voltage: 120 Volts


Maximum Temperature: 167 Degrees Fahrenheit


Heat Output: 1440 Watts


Efficiency: Energy-efficient


Maximum Pressure: 150 Pound per Square Inch


Mount Type: Floor & Wall & Under Sink


Is Electric: Yes


Color: White


Style Name: Modern and minimalist


Material Type: Acrylonitrile Butadiene Styrene, Magnesium, Plastic


Capacity: 4 Gallons


Item Dimensions W x H: 14.97"W x 14.97"H


Item Weight: 22.5 Pounds


Item Depth: 14.96 inches, 38 centimeters


Brand Name: SHIWAKOTO


Model Number: SH-WBHWT-D15-14EA(N)


Manufacturer: SHIWAKOTO


Manufacturer Part Number: SH-WBHWT-D15-14EA(N)


Included Components: Bracket ×1, Fastening Screw ×2, Plastic Expansion Tube ×2, T/P Valve ×1, User Manual ×1


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Apr 16

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.

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Top Amazon Reviews


  • Great little water heater for my camper
I installed this 4-gallon water heater in my small camper, and so far it has been great! Installation was straightforward since the electrical uses a standard plug 110VAC, and the water connections and pressure/temperature relief valve are threaded. It heats up quickly and holds enough hot water for doing dishes or washing up. The compact size fits nicely in the cabinet. I really appreciate the flexibility of floor or wall mounting. Not meant for long showers, but perfect for light use. Operation is silent. The design is elegant and functional with a single dial to adjust the water temperature, and a single LED to indicate when the unit is heating. ... show more
Reviewed in the United States on May 23, 2025 by bloads2001

  • Working great so far.
This seems to be working great for the first few days, so far so good. It seems to heat up quickly and efficiently on demand to heat enough water for washing dishes or even a quick shower. It costs about the same as another water heater I have and does work better with out all of the extra wiring as the other one. As long as you can safely run all of the pipes and plug it in it should be an easy set up for anyone. At this point I would recomend this. ... show more
Reviewed in the United States on April 19, 2025 by Jeremy

  • Good Small Heater
Pros: ✅ Efficient Heating – Quickly heats water on demand, perfect for handwashing, dishwashing, or even a quick shower. ✅ Easy Installation – Simple setup with straightforward wiring and plumbing requirements. ✅ Durable & Leak-Free – Reliable build with no leaks reported, ensuring lasting performance. ✅ Versatile Use – Ideal for bathrooms, garage sinks, camping, mudrooms for bathing pets, and more. ✅ Auto Shutoff – Automatically turns off when water reaches the desired temperature, saving energy and water. ✅ Great Value – Affordable price point with strong performance compared to similar models. Cons: ❌ Larger Size – Bigger than expected, which may limit placement options Final Verdict: ⭐⭐⭐⭐☆ (4.5 out of 5) This water heater offers fast, efficient heating with easy installation and reliable durability, making it a great choice for a variety of small to medium hot water needs. Its automatic shutoff feature and leak-free design add convenience and safety. While a bit bulky for some very compact spots, it’s excellent value and well-suited for bathrooms, bars, garages, or even outdoor use like camping. Highly recommended for anyone needing quick hot water without complex setup. ... show more
Reviewed in the United States on May 19, 2025 by Chad

  • Perfect for my bar bathroom
This product works great for the bathroom in my bar. Since people are only washing their hands the capacity size is great. No leakage and seems durable enough to last awhile. Heats up great and gets the job done. Installation was very simple.
Reviewed in the United States on May 9, 2025 by Resto_Dad

  • Works Great
This heats quickly. I'm actually using it for a garage sink that doesn't have a hot water heater. It's spring now but it's hard to use that sink in the winter. I tested it and it works after heating for just a few minutes. It would be great for camping or maybe even bathing dogs in the mud room.
Reviewed in the United States on April 27, 2025 by AmandaGal

  • Nice water heater
Eaasy to install, works as expected
Reviewed in the United States on May 13, 2025 by William

  • Bigger than I expected
This heater is bigger than I expected. I was looking for something to attach to a bidet. I ended up setting it up under my bathroom sink instead. It works well. Water heats up quickly and it shuts off automatically. Didnt kniw I needed this. No more running water until i get hot water. Great value for the price. ... show more
Reviewed in the United States on April 24, 2025 by Ed Ucator

  • Great value
Great heater it’s easy to install and works great the water gets hot fast and I highly recommend this product
Reviewed in the United States on April 18, 2025 by Lyze

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