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Ariston Andris 4 Gallon 120-Volt Corded Point of Use Mini-Tank Electric Water Heater

4.5 4.5 out of 5 stars 1,539 ratings
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Amazon's Choice in Water Heaters by Ariston

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4 Gallon

Purchase options and add-ons

Brand Ariston
Product Dimensions 14.25"W x 14.25"H
Wattage 1440 watts
Voltage 120 Volts
Mounting Type Wall
Capacity
4 Gallons
Power Source
AC
Material
Glass
Style
Indoor Installation

About this item

  • Save space with a compact design that fits under a sink; can be wall or floor mounted in a discreet location
  • Provide immediate, stored hot water at the point of use that can be used as a stand alone water heater or as a booster for your primary water heater
  • Plugs into a standard 110/120 Volt outlet with 1/2" NPT inlet and outlet water connections. 6-year warranty on tank, 2-year warranty on parts
  • Perfect for multiple applications: in-law suites, kitchenettes, pool houses, garages, stores, offices, bathrooms and anywhere you need hot water fast
  • TitanShield exclusive technology that fully protects inner surface against corrosion, with robust environmentally safe insulation that increases energy efficiency
See more product details

Customer ratings by feature

Temperature Control
4.6 4.6
Easy to install
4.5 4.5
Value for money
4.1 4.1
Tech Support
3.6 3.6

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$169.99
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Sold by Ariston and ships from Amazon Fulfillment.
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$20.89
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Sold by Quality Parts Now and ships from Amazon Fulfillment.
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Ariston Andris 4 Gallon 120-Volt Corded Point of Use Mini-Tank Electric Water Heater
Ariston Andris 4 Gallon 120-Volt Corded Point of Use Mini-Tank Electric Water Heater
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Price$169.99$314.00$169.99$199.99$239.99-7% $139.99
List:$149.99
Delivery
Get it as soon as Sunday, Mar 31
Get it as soon as Wednesday, Apr 3
Get it as soon as Sunday, Mar 31
Get it as soon as Tuesday, Apr 2
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Customer Ratings
Temperature Control
4.6
4.1
4.2
4.3
Easy to install
4.5
4.3
4.4
4.6
Tech Support
3.6
4.4
4.0
3.7
Sold By
Ariston
Ariston
Fogatti RV World
THMOS
Fogatti Water Heater
Moonguiding
capacity
4 gallons
12 gallons
4 gallons
4 gallons
8 gallons
3.99 gallons
power source
AC
AC
Corded Electric
Corded Electric
Corded Electric(With Plug)
Corded Electric
mounting type
Wall
Wall-mounted, Floor-mounted
Wall or Floor
Wall or Floor Mounted
Wall
material
Glass
Carbon Steel
SPGC
Fused ceramic
SPGC
Stainless Steel
style
Indoor Installation
12 Gallon
Indoor Installation
4 Gallons
Enamel
Indoor Installation

Product Description

The Ariston Andris 4 Gal. 6-Year Corded 120-Volt Point of Use Mini-Tank Electric Water Heater has a mini tank that eliminates the long trip through pipes that water usually has to take from the water heater to the sink. This powerful, yet compact water heaters purpose is to provide you with hot water, when and where you need it. Installation has never been easier, with a simple tap into a cold water line and a standard 120-Volt outlet.

4 gallon mini tank

Ariston
POINT OF USE TANK
  • Durable titanium glass-lined tank
  • Eliminates the need for a recirculation line
  • High efficiency CFC free foam insulation
  • Space saving compact unit
  • Wall or floor mounted (wall brackets & rubber feet included)

ANDRIS RS 4 GALLON ELECTRIC MINI TANK WATER HEATER

  • The 4 gallon model has a simple 120 VAC plug-in for easy installation
  • Single faucet or booster unit in a water heating system
  • Instant hot water upon demand! Water is not wasted while waiting for hot water to arrive from the tank
  • Included temperature/pressure relief valve (factory installed on the 2.5 & 4 gal. units)

Hot Water Whenever You Need It

Single Faucet Unit

Booster Unit

Mini- Tank-AR-SC

SINGLE FAUCET UNIT

  • Remote locations
  • Single water line
  • Wall or floor mounted
  • Eliminates the need for a recirculation line
  • Easy Installation

BOOSTER UNIT

  • Improve existing capacity
  • No waiting time
  • Load reduction
  • Eliminates the need for a recirculation line
  • Built-In redundancy

SINGLE FAUCET OR BOOSTER UNIT IN A WATER HEATING SYSTEM

This compact yet powerful hot water heater supplies instant hot water to even the most remote locations:

  • Smaller/Second properties
  • In-Law suites, Kitchenettes
  • Sinks located far from water heater: Pool House/Garages
  • Supplemental hot water for high-flow fixtures
  • Commercial bathroom sinks

Ariston
2.5 Gallon 4 Gallon 8 Gallon
Andris 2.5 Gal. 6 Year 120-Volt Point of Use Mini-Tank Electric Water Heater Andris 4 Gal. 6 Year 120-Volt Point of Use Mini-Tank Electric Water Heater Andris 8 Gal. 6 Year 120-Volt Point of Use Mini-Tank Electric Water Heater
Customer Reviews
4.5 out of 5 stars
1,539
4.5 out of 5 stars
1,539
4.5 out of 5 stars
1,539
Model Number ANDRIS RS 2.5U 1.4KW ANDRIS RS 4U 1.4KW ANDRIS RS 8U 1.4KW
Tank Capacity 2.5 Gallons 4 Gallons 8 Gallons
Installation Undersink Vert Undersink Vert Undersink Vert
Tank Titanium Glass Titanium Glass Titanium Glass
Regulation Temp Knob Knob Knob
Dimensions (pipes included) 14.25"W x 14.25"H x 10.75"D 14.25"W x 14.25"H x 12.75"D 17.50"W x 17.50"H x 15.25"D
Weight (empty) 15.5 lbs 17.6 lbs 29.5 lbs
Max Water Pressure 150 psi 150 psi 150 psi
Power at 120 Vac 1,440 W 1,440 W 1,440 W
Temperature Range 65-161°F 65-161°F 65-161°F
Ariston

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Warranty & Support

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Ariston Andris 4 Gallon 120-Volt Corded Point of Use Mini-Tank Electric Water Heater


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Product guides and documents

Important information

Wattage

1440 watts

Bulb Voltage

120 volts

Customer reviews

4.5 out of 5 stars
4.5 out of 5
1,539 global ratings

Customers say

Customers like the quality, ease of installation, temperature and size of the water heater. For example, they mention it works well, it's simple to hook up and that it makes hot water within seconds. Some appreciate the value, versatility, and appearance of the product. That said, some complain about the leakage.

AI-generated from the text of customer reviews

182 customers mention149 positive33 negative

Customers like the quality of the water heater. They say it works well, gets the water hotter than expected, and is versatile. Some mention it works perfect in their 5 wheel camper, wet bar, and dishwasher. Overall, customers are satisfied with the performance and quality of this product.

"...This is truly a great product. It has performed flawlessly, it's compact and genuinely attractive...." Read more

"Outstanding product and built with quality and performance. I was amazed how easy it was to install...." Read more

"...The 4 gallon version I got works wonderful for the dishwasher and it only needs 110v/120v of AC power...." Read more

"...The unit is relatively easy to install and works off 120VAC, which makes it very versatile. Hot water is almost instant and very hot...." Read more

109 customers mention90 positive19 negative

Customers like the temperature of the water heater. They say it's easy to install, makes hot water within seconds, and does a great job of heating water. The 6 gallon size is perfect, and it has more than enough hot water for a nice long shower. The unit has enough of a ballast so there's no significant drop in water temperature in use, and the hot water is readily available in minutes.

"...this route or choose a mini point of use tankless unit, you get hot water instantaneously. It's a game changer...." Read more

"...star rating and the fact that when I turn on the the hot water, it is hot right away! No wasted water." Read more

"...Hot water is almost instant and very hot. The downside is that my unit started leaking after 2 years and three months, and required replacement...." Read more

"Excellent packaging. Easy to install. Makes hot water within seconds not minutes like before!!" Read more

108 customers mention97 positive11 negative

Customers find the installation of the water heater to be easy. They mention that it is simple to hook up with the new Sharkbite fittings, and that the instructions are clear. Customers also say that the water saves them time and convenience.

"...However, saving water and adding convenience is what sells it...." Read more

"...I was amazed how easy it was to install...." Read more

"This is a bit of a mixed review.The unit is relatively easy to install and works off 120VAC, which makes it very versatile...." Read more

"Excellent packaging. Easy to install. Makes hot water within seconds not minutes like before!!" Read more

29 customers mention25 positive4 negative

Customers like the size of the water heater. They mention it's compact and takes up less space than the typical RV 6 gal. Some say it'll fit perfectly under their sink and is great for an outdoor kitchen.

"...This is truly a great product. It has performed flawlessly, it's compact and genuinely attractive...." Read more

"...Compact size fits better than some models, case is cool so good insulation. Made in Italy." Read more

"These are fantastic! Fits nicely under sink - no more wasting gallons of water waiting for hot water to arrive from the tank!..." Read more

"...Perfect placement and perfect for my situation. I now literally have instant hot water at my kitchen faucet. That being said, I'm a plumber...." Read more

25 customers mention25 positive0 negative

Customers appreciate the value of the water heater. They mention it's a great investment, and a cost-effective solution for instant hot water.

"...So, overall, given the affordable price of this unit and the fact that Aniston does a great job honoring their warranty, I would (and did) buy this..." Read more

"...reflects quality workmanship and engineering, and the really reasonable price was a bonus. I would definitely buy again." Read more

"...I get the hot water I needed, the noise is not startling and the price was great!..." Read more

"...It is big so make sure you have the room. Fast delivery and great price" Read more

20 customers mention20 positive0 negative

Customers find the water heater versatile. They mention it's great for shop or garage utility sink, perfect for the kitchen, shower, baths, and under sink kitchen and bathrooms. Some say it'll provide enough hot water for both bath and shower. Overall, customers are happy with the product's versatility and recommend it to others.

"...is relatively easy to install and works off 120VAC, which makes it very versatile. Hot water is almost instant and very hot...." Read more

"...This simple device has transformed my kitchen experience!" Read more

"...It has helped us in the kitchen tremendously. I am very pleased." Read more

"...with the water I plug it in for a while and then unplug it it's good for the shower. Glad I got the bigger one" Read more

15 customers mention15 positive0 negative

Customers are satisfied with the appearance of the water heater. They mention that it is well designed, and well built. The case is cool, and it has good insulation. Some customers also mention that the product is impressive and a great little heater.

"...It has performed flawlessly, it's compact and genuinely attractive...." Read more

"...Compact size fits better than some models, case is cool so good insulation. Made in Italy." Read more

"These are fantastic! Fits nicely under sink - no more wasting gallons of water waiting for hot water to arrive from the tank!..." Read more

"replacement for an old unit and very attractive." Read more

35 customers mention6 positive29 negative

Customers are dissatisfied with the leakage of the water heater. They mention that it started leaking after 2 years and three months, the pressure relief valve was a little leaky, and the water started coming out of the faucet when they turned it on. Some say that the unit will not siphon drain and that the TP valve is faulty. Overall, customers are not happy with their purchase and recommend looking for a different water heater or water heating system.

"...The downside is that my unit started leaking after 2 years and three months, and required replacement...." Read more

"...it exceeds or B) the TP valve is faulty...." Read more

"...30 year old water heater in our 5th wheel camper, the pressure relief valve was a little leaky so had to take off and add more Teflon tape ...." Read more

"...Bought in Oct. 2020 and in March of 2023 it leaked, blew the breaker and ran water all over under my sink...." Read more

Buy the service valves!!
5 Stars
Buy the service valves!!
Before it would take me 1.5mins to get hot water to my kitchen sink. I replaced the lines running into my kitchen from steel galvanized lines (due to the rust in the lines getting in my drinking water) to PEX B (the crimp kind of pex, not the expanding Pex A). In the process I decided it would be a good ideal to perhaps look into this type of setup instead of waiting the 1.5mins to get my hot water at the kitchen sink. I researched the amount of water my dishwasher would need and which unit would be sufficient for my application. I then removed BOTH steel lines into my kitchen and ran 1 cold water line. I then put a Tee in the cold water line in which 1 runs to my cold water faucet connection and the other runs into this unit. Then I plumbed my hot water off the heater to the fixtures via a 1/4 turn valve to pex B end.THIS IS BY FAR the best upgrade I have ever made to my home in a LONG time. Why didn't I do this sooner?! The 4 gallon version I got works wonderful for the dishwasher and it only needs 110v/120v of AC power. Since I ran the Tee on the cold water coming in, I should have ran 3/4" Pex B, but I can do that in the future (if needed).Notes of installation:1. The outlets on the heater cold and hot side are 1/2" so to run the service valves I had to buy a brass adaptor to convert to 3/4" (brass adapter I purchased, but would be better to use PVC between the different metals https://www.amazon.com/dp/B0823NKRX3?ref=ppx_pop_mob_ap_share2. BUY THESE SERVICE VALVES: HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass https://a.co/d/6iY91JtI've saw TONS OF PEOPLE complaining they have to remove the tank to drain it, buy these valves and you won't have to do that! C'mon people!3. DO NOT plug this unit into the same plug-in under your sink as your dishwasher. The load is too much to run both and is a fire hazard!! I ran a dedicated 20amp circuit from my main panel to a GFCI plugin (required by code and good idea since it lives under the sink and water can make contact to it)! Do NOT skip this step! 12-2 Romex is rated for 20amp and assuming you are not running at 100' AND this is the only draw to the circuit, then you should be good to go.4. Remember to flush the heater 1-2 times a year using the above mentioned service ports. YouTube has plenty of videos on what you need.5. I hope this helps you to settle the debate on which one to buy, this or the Bosch one (that I passed on due to mixed reviews)6. A cheap $1.25 Dollar Tree holiday ham/turkey foil pan fits under it nicely
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Top reviews from the United States

Reviewed in the United States on April 22, 2021
Size: 2.5 GallonVerified Purchase
Customer image
5.0 out of 5 stars This is a life changer and a profound water conservation appliance
Reviewed in the United States on April 22, 2021
It's earth day and appropriately so I decided to weigh in on the reviews. I've had my Ariston 2.5 gallon water heater installed (I did this personally, big fan of DIY projects) for 4 mos. As an avid cook, I am constantly needing short bursts of hot water to rinse my hands, clean utensils, rinse wine glasses, etc. This is the solution. Never a better home improvement idea has been fulfilled that I can even compare to installing this water heater. Because this is a tank, it can provide water at a very low pressure/volume. The sort of low volume that would otherwise not trigger many tankless water heaters to start heating. More importantly, no more grief as you wait endlessly for the water to get hot. Most people aren't even aware that their dishwashers/washing machines are filling up with cold water (on the "HOT" water setting) because the water from the line is not hot yet and the machine will most likely be full by the time the water is hot. I have my tank connected to my incoming hot water line (from the tankless main unit outside my house) to my kitchen sink/dishwasher using a "T" adapter. I power both with a single outlet also with an adapter. The two can run simultaneously as I've discovered without tripping the breaker. 

This is truly a great product. It has performed flawlessly, it's compact and genuinely attractive.  There's no noise while it's heating up the water and it maintains temperature really well. The other cool thing is that if I'm needing more than (2.5 gallons) what's in the tank, the refill water flowing into it (from my tankless main water heater) will be hot by then. Saves money and electricity, wear and tear, etc.  Again, in my case, this unit serves as a flow through ('in line") source of hot water. 
Before purchasing this, I ran the sink until the water was adequately hot and discovered over two gallons of water went down the drain.  In a kitchen, it's really common to require incremental and low volume hot water. Constantly waiting and wasting just to do a quick rinse of your hands is enough to justify adding this to your life. However, saving water and adding convenience is what sells it. Remember, this unit is not coming up to temperature gradually, it is storing water at a constant temperature. Whether you go this route or choose a mini point of use tankless unit, you get hot water instantaneously. It's a game changer. I've been so happy (and enlightened) with this that I've offered to install one for a relative who has the same water wasting set up. It's one way (as is this review to inspire people to get one of these) to pay forward wisdom that changes the planet for the better. Don't procrastinate. This will be one of the best decisions you'll make to add convenience to your otherwise crazy family life like mine. And you'll be patting yourself on the back wondering why you hadn't done this a long time ago.  Best of luck!!!
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35 people found this helpful
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Reviewed in the United States on January 14, 2024
Size: 2.5 GallonVerified Purchase
Customer image
5.0 out of 5 stars You want hot water? Not cold water!
Reviewed in the United States on January 14, 2024
Outstanding product and built with quality and performance. I was amazed how easy it was to install. Disconnect your hot water line to the sink faucet, then connect a line from the hot water line to the blue intake on the heater. Bring the faucet line over to the red output line and use teflon tape and do not over tighten using non compression lines. Put the unit on a waterproof tray and I seen many pictures of the pressure release valve and none used the existing water PVC tubing to run the pressure relief hose directly into the sink drain tubes. Easily purchased a (8” dishwasher branch baffled tailpiece) installed it directly to the sink drain with a plastic hose to the Ariston water heater pressure relief valve. Having knowledge of plumbing is very helpful in this installation. I never opened the installation manual. I did browse over the quick installation guide. If you feel this is not your forte then get someone with plumbing experience to help you. I give this a 5 star rating and the fact that when I turn on the the hot water, it is hot right away! No wasted water.
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3 people found this helpful
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Reviewed in the United States on November 9, 2023
Size: 4 GallonVerified Purchase
Customer image
5.0 out of 5 stars Buy the service valves!!
Reviewed in the United States on November 9, 2023
Before it would take me 1.5mins to get hot water to my kitchen sink. I replaced the lines running into my kitchen from steel galvanized lines (due to the rust in the lines getting in my drinking water) to PEX B (the crimp kind of pex, not the expanding Pex A).

In the process I decided it would be a good ideal to perhaps look into this type of setup instead of waiting the 1.5mins to get my hot water at the kitchen sink. I researched the amount of water my dishwasher would need and which unit would be sufficient for my application. I then removed BOTH steel lines into my kitchen and ran 1 cold water line. I then put a Tee in the cold water line in which 1 runs to my cold water faucet connection and the other runs into this unit. Then I plumbed my hot water off the heater to the fixtures via a 1/4 turn valve to pex B end.

THIS IS BY FAR the best upgrade I have ever made to my home in a LONG time. Why didn't I do this sooner?! The 4 gallon version I got works wonderful for the dishwasher and it only needs 110v/120v of AC power. Since I ran the Tee on the cold water coming in, I should have ran 3/4" Pex B, but I can do that in the future (if needed).

Notes of installation:
1. The outlets on the heater cold and hot side are 1/2" so to run the service valves I had to buy a brass adaptor to convert to 3/4" (brass adapter I purchased, but would be better to use PVC between the different metals https://www.amazon.com/dp/B0823NKRX3?ref=ppx_pop_mob_ap_share
2. BUY THESE SERVICE VALVES: HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass https://a.co/d/6iY91Jt

I've saw TONS OF PEOPLE complaining they have to remove the tank to drain it, buy these valves and you won't have to do that! C'mon people!

3. DO NOT plug this unit into the same plug-in under your sink as your dishwasher. The load is too much to run both and is a fire hazard!! I ran a dedicated 20amp circuit from my main panel to a GFCI plugin (required by code and good idea since it lives under the sink and water can make contact to it)! Do NOT skip this step! 12-2 Romex is rated for 20amp and assuming you are not running at 100' AND this is the only draw to the circuit, then you should be good to go.

4. Remember to flush the heater 1-2 times a year using the above mentioned service ports. YouTube has plenty of videos on what you need.

5. I hope this helps you to settle the debate on which one to buy, this or the Bosch one (that I passed on due to mixed reviews)

6. A cheap $1.25 Dollar Tree holiday ham/turkey foil pan fits under it nicely
Images in this review
Customer image Customer image Customer image
Customer imageCustomer imageCustomer image
5 people found this helpful
Report