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
Condition: New
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Availability:
Only 10 left in stock, order soon!
Arrives
Friday, Jul 31
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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
Power Source: AC
Special Features: Adjustable Temperature, Easy to Install, Overheat Protection, Pressure Release Valve, Waterproof
Wattage: 1500 watts
Voltage: 120 Volts (AC)
Flow Rate: 0.45 Gallons Per Minute
Maximum Temperature: 149 Degrees Fahrenheit
Heat Output: 1500 Watts
Efficiency: 95%
Maximum Pressure: 108 Pound per Square Inch
Mount Type: Wall
Is Electric: Yes
Maximum Pressure: 130 Pound per Square Inch
Color: White
Style Name: 4 Gallon Water Heater with Water Diverter
Material Type: SPGC
Brand Name: Fisoceny
Model Number: Tank40B
Manufacturer: Fisoceny
Manufacturer Part Number: 4 Gallon Water Heater 678
Included Components: 4 Gallon Water Heater x 1, Install Bracket Kit x 1, Pipe Hose x 2, Pressure Realse Valve
Unit Count: 1.0 Count
Item Type Name: 120v water heater
Capacity: 4 Gallons
Item Dimensions W x H: 14"W x 12.8"H
Item Weight: 13 Pounds
Item Depth: 13 inches
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Jul 31
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Oh man, we love these! Our house has the water heater in the Master Bedroom Closet ~ which is on the opposite side of the house with all of the plumbing! Takes forever to get hot water to the bathrooms and kitchen. I got tired of hearing the wife complain about it, so I tried one of these POS (point of service) water heaters. It worked so great that I installed one for every sink and shower ~ five altogether. Now you turn on the hot water and it's there. No more waiting two minutes for it to get there. It's a snap. The installation is pretty straight forward, it comes with pretty much everything you will need for the plumbing. What you will need at each POS is the electrical ~ a duplex outlet. If you know how to run a line and install an outlet it's really a piece of cake. Otherwise you can have all or part of it done for probably not much more than the cost of the unit. But it's worth it if you want hot water now not later. Where we live water comes at a premium price so we are saving money all the time on that now. Glad we got em. They're keepers!
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Reviewed in the United States on October 12, 2025 by Phil Davis
Color: White
Size: 14.2in x 13.8 in x 12.2 in
It works wonderful. It heats up real good and easy to install.
Reviewed in the United States on April 12, 2026 by Barbara Jones
Color: White
Size: 14.2in x 13.8 in x 12.2 in
Had a 2.5 gallon that started leaking. Bought this one for more capacity. Poorly designed. Only puts out a gallon or so of hot water, then goes cold. If you wait 5-10 minutes you'll get another gallon. I would have sent it back but waited too long to install. Also, one of the supply hoses started leaking after about a month.
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Reviewed in the United States on April 1, 2026 by Mary Rose
Color: White
Size: 14.2in x 13.8 in x 12.2 in
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
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Reviewed in the United States on June 1, 2025 by True reviews
It gives you about 2 1/2 gallons before starting to get cold. Fortunately for under my kitchen sink when connected to the hot water line it allows just enough hot water to compensate for the cold that typically comes out before hot water from the household hot water heater gets to the sink. For me it works for what I need it and the price was right and I already had a 110v outlet under the sink. I would only use this for the same purpose. I would not purchase it for any other purpose.
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Reviewed in the United States on February 26, 2025 by Dave & Lorna T
I purchased this heater to put under the kitchen sink in my house because it was taking far too long for the hot water to make it all the way across the house. I ran the house hot water line into the cold water in line “blue” this gives me 2.5 gallons of instantly hot water immediately then if that gets used up the hot water from the main water heater should take over. Installation was easy. I did need a small adapter to reduce the tank outlet to the proper size because the flex hose was not removable from my faucet so I could not use one of the hoses that was supplied with the heater. You can see the adapter I used in the second photo coming out of the hot water side “red” I did notice a few drops of water from the pressure relief valve but the instructions said this is to be expected at first so hopefully it stops. I ran the clear tubing from the pressure relief valve into the drain above the P-trap by drilling a hole just large enough to fit the tube in and sealed around it with silicone. I set the heat at half way. Any higher and it is too hot for my liking.
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Reviewed in the United States on November 1, 2024 Reviewed in the United States on November 1, 2024 by Gregory Hoover
Color: White
Size: 14.2in x 13.8 in x 12.2 in
This is in a cabinet under our bathroom sink. Hot water from the The heater itself works well, but the included pressure valve is ABSOLUTE GARBAGE! It would not seal with the included washer. I got some better washers and used one. About two weeks later, the GFCI plug had tripped. I looked under the sink and that worthless valve had sprung a leak, filled the pan I had under it, and shorted out the internal heater wiring, popping the GFCI plug. Fortunately, once I pulled off the junk valve, and let the unit dry out for several days, it's working again. I would have been mad as a hornet if a cheap $3 dollar valve had destroyed that heater!
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Reviewed in the United States on November 28, 2025 by J H
I’ll preface this review by stating this heater is only being used for a single sink and a bidet in a warehouse. With that being said, I’m quite happy with my purchase. It was easy to install, the water can actually get very hot even if set only about 50-60% of the way and I haven’t had any leaking issues. I’m no plumber but I know to always use pluming tape when installing plumbing accessories. The item does require a decent amount of space. It is a two gal tank after all but other than that I have no issues; and it does fit under the bathroom sink pretty comfortably. The unit is used during the day time only and is shut off at the end of the work day. I’ve had it for a few weeks now and that seems to work really well. It also only takes about 10-15 mins to get to temp when set at 50%. It may heat quicker if set to max.
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Reviewed in the United States on February 12, 2025 by Jay J.