Search  for anything...

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 73 reviews
Condition: New
Checking for the best price...
$123.99 Why this price?
Save $46.00 was $169.99

Buy Now, Pay Later


As low as $20.67 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


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

Arrives Wednesday, Sep 24
Order within 16 hours and 12 minutes
Available payment plans shown during checkout

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


Product Dimensions: 14"W x 12.8"H


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


Color: White


Wattage: 1500 watts


Brand: ‎Fisoceny


Product Dimensions: ‎14"W x 12.8"H


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


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


Maximum Pressure: ‎130 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


Country of Origin: ‎China


Item model number: ‎Tank40B


Size: ‎4 Gallon


Shape: ‎Rctangular


Installation Method: ‎Floor-Mounted


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


Included Components: ‎4 Gallon Water Heater x 1, Pipe Hose x 2, Install Bracket Kit x 1, 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: Wednesday, Sep 24

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
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Working great
Color: White Style: 4 Gallon Water Heater with Water Diverter
I put the heater in my camper as it was over 500 and a pain to replace the stock gas one. I install it above my toilet and was easy to plumb and plug into my vanity outlit. I just turn it on high and run the first gallon into a bucket then shower until water turns warm then add some to the bucket then turn the water off at the shower head suds up shave after 5 min it's running hot again I rinse and use the bucket water to fi fish. I'm getting a better hot shower then the stock propane heater ever did and saving a lot of propane ... show more
Reviewed in the United States on June 1, 2025 by True reviews

  • Good Purchase
Color: White Style: 2.5 Gallon Water Heater with Water Diverter
Water heats up quick. Easy install.
Reviewed in the United States on May 20, 2025 by Amazon Customer

  • Hit Water
Color: Gray Style: 2.5 Gallon LED Display Water Heater with...
Very efficient and does heat the water as promised
Reviewed in the United States on June 23, 2025 by Adrian Taylor jr.

  • Good purchase
Color: White Style: 4 Gallon Water Heater with Water Diverter
I'm amazed at quickly it heats up. It's perfect for a small cabin we use occasionally in the summer. Definitely recommend.
Reviewed in the United States on July 8, 2025 by Amazon Customer

  • Happy Happy
Color: White Style: 4 Gallon Water Heater with Water Diverter
Easy to work with. Highly recommended I put it in a food truck and is working perfect
Reviewed in the United States on June 23, 2025 by adrian diaz adrian diaz

  • Junk
Color: Black Style: 2.5 Gallon Water Heater with Water Diverter
lasted 2 months, now blows breaker as soon as it is plugged in.
Reviewed in the United States on June 17, 2025 by William A. Deaton

  • Thermostat control
Color: White Style: 4 Gallon Water Heater with Water Diverter
You got to keep it on high but it works fine
Reviewed in the United States on June 8, 2025 by ponyboy

  • Point of use water heater.
Color: White Style: 2.5 Gallon Water Heater with Water Diverter
Why did you pick this product vs others?: Installed this under my kitchen sink to have hot water sooner. Now I don’t have to run one two gallons of water waiting for hot water to get to the sink.
Reviewed in the United States on June 28, 2025 by C D Jenkins

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...