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4 Gallon Tank Water Heater Under Sink Instant Hot Water 1500w 120V,Kitchen Under Counter RV Small Hot Water Heater with Release Valve 3-Way Diverter Vavle,1/2" NPT White

  • Based on 132 reviews
Condition: New
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$149.99 Why this price?
Memorial Day Sale · 12% off was $169.99

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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon

Arrives Monday, May 25
Order within 7 hours and 43 minutes
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Color: White


Style: 4 Gallon Water Heater with Water Diverter


Features

  • Quickly Heating and Fast Recovery-Fisoceny 4 gallon water heater delivers rapid heating with 95% thermal efficiency, obtain hot water in 5-10 minutes.Featuring an L-shaped heating element to Increase the heating area and speed up heating.quick recovery time will eliminate cold-water delays. Say goodbye to the trouble of cold water when washing your face,vegetables,or dishes
  • Safe and reliable quality-Fisoceny 4 gallon water heater has been upgraded with a 304 stainless steel tank body and seamless welding technology to ensure a sturdy and durable overall structure. And our mini tank water heater has passed UL certification.In addition,corrosion resistance,high pressure resistance,dry burning prevention,overheating protection ensure your safe use
  • Easy to Install and Use-This under sink hot water heater is equipped with a pressure release valve,adapter water hose, and is suitable for a 1/2 "FIP interface,without additional cost or preparation.this household water heater can be wall mounted or floor mounted, easily installed under kitchen sink,and widely used in RVs, trailers, camping, offices, bathrooms, etc.Rotating the mechanical knob can adjust the temperature between 86 and 149 F, making it very easy to operate
  • Efficient insulation and energy saving-L shaped heating tube effectively enhances the heating surface area and efficiency of the water inside the tank.The tank water heater is built in smart temperature control chip,and when it reaches the temperature you set,the water heater will automatically enter insulation mode.and we have upgraded the traditional insulation layer of the water heater to fluorine free polyurethane foam filling,which minimizes heat loss and extends the insulation time to the greatest extent possible
  • Large capacity water heater-Compared to other small water heaters,it provides a more durable hot water supply,reduces frequent heating,and is more worry free for continuous use.In addition,this water heater is suitable for currents ranging from 110V-120V AC,with a maximum working water pressure of 108psi and a recommended circuit breaker rating of 15 amperes

Brand: Fisoceny


Capacity: 4 Gallons


Power Source: AC


Product Dimensions: 14"W x 12.8"H


Special Feature: Adjustable Temperature, Easy to Install, Overheat Protection, Pressure Release Valve, Waterproof


Brand: ‎Fisoceny


Product Dimensions: ‎14"W x 12.8"H


Special Feature: ‎Adjustable Temperature, Easy to Install, Overheat Protection, Pressure Release Valve, Waterproof


Color: ‎White


Wattage: ‎1500 watts


Voltage: ‎120 Volts (AC)


Maximum Flow Rate: ‎0.45 Gallons Per Minute


Maximum Temperature: ‎149 Degrees Fahrenheit


Heat Output: ‎1500 Watts


Efficiency: ‎95%


Style: ‎4 Gallon Water Heater with Water Diverter


Maximum Operating Pressure: ‎108 Pound per Square Inch


Mounting Type: ‎Wall


Is Electric: ‎Yes


Manufacturer: ‎Fisoceny


Item Depth: ‎13 inches


Part Number: ‎4 Gallon Water Heater 678


Item Weight: ‎13 pounds


Item model number: ‎Tank40B


Size: ‎4 Gallon


Shape: ‎Rctangular


Installation Method: ‎Floor-Mounted


Special Features: ‎Adjustable Temperature, Easy to Install, Overheat Protection, Pressure Release Valve, Waterproof


Included Components: ‎4 Gallon Water Heater x 1, Install Bracket Kit x 1, Pipe Hose x 2, Pressure Realse Valve


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: December 18, 2024


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, May 25

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

Learn more about financing & leasing here.

Top Amazon Reviews


  • Installed in campervan
Works great
Reviewed in the United States on January 7, 2026 by marc onesta

  • Fast hot water!!
I’ve had it about 2 months and am very pleased so far. Easy installation woks well under my kitchen sink!!
Reviewed in the United States on December 23, 2025 by Silverprinc

  • Great for saving space i.e. in a travel trailer, RV or tiny house
Color: White Style: 4 Gallon Water Heater with Water Diverter
Gave as a gift to my niece who now uses it in her travel trailer for washer, dishwasher, shower & sink. Her travel trailer is too small for a big water heater so this point of use water heater is perfect!
Reviewed in the United States on January 2, 2026 by Clay's corner

  • THEY LEAK.
Color: White Style: 2.5 Gallon Water Heater with Water Diverter
Don’t waste your money. I bought 3 of these, and 2 of them leak water. The very low quality TNP valves don’t stop draining water, and water leaks out of them flooding the cabinet.
Reviewed in the United States on February 5, 2026 by Excellent saddles for such price.

  • Good water heater
Some of the fittings didn't match what I had, but hooked it up and it delivers hat water. Have it on a single sink in the barn so it's nice to wash hands with nice warm water
Reviewed in the United States on December 27, 2025 by Beth

  • Hot water every time…
Color: White Style: 4 Gallon Water Heater with Water Diverter
This heater came with everything needed for my 5th wheel, no issues or worries of breakers tripping and no more cold showers, hopefully since not in use 24/7, that it will continue to work for a long time, I recommend it
Reviewed in the United States on February 12, 2026 by jaime Atwood

  • This water heater does the job .
Color: White Style: 4 Gallon Water Heater with Water Diverter
Looks good and well made this can be placed anywhere. So far it has worked well.
Reviewed in the United States on December 3, 2025 by WKHUDGINS

  • Water Heater
Color: White Style: 4 Gallon Water Heater with Water Diverter
Just what we needed for some hot water on our outdoor sink. Water heats up fast and is hot. Works well and quality seems very good. Easy to install. Good value for the money. Just installed it, so hopefully it will last a few years.
Reviewed in the United States on August 28, 2025 by sue h.

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