---
product_id: 139419372
title: "4 Gallon Capacity, 120-Volt – Ariston Andris Mini Tank Electric Water Heater – Heating Solution for Under Sink, RV, and Compact Spaces, Smart Boost for Versatile Heating, Simple Installation"
brand: "ariston"
price: "$894"
currency: NZD
in_stock: true
reviews_count: 4
category: "Ariston"
url: https://www.desertcart.nz/products/139419372-4-gallon-capacity-120-volt-ariston-andris-mini-tank-electric
store_origin: NZ
region: New Zealand
---

# 1440W fast heating 4-gallon compact tank easy DIY install 4 Gallon Capacity, 120-Volt – Ariston Andris Mini Tank Electric Water Heater – Heating Solution for Under Sink, RV, and Compact Spaces, Smart Boost for Versatile Heating, Simple Installation

**Brand:** ariston
**Price:** $894
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your space with instant hot water — convenience meets sustainability!

## Quick Answers

- **What is this?** 4 Gallon Capacity, 120-Volt – Ariston Andris Mini Tank Electric Water Heater – Heating Solution for Under Sink, RV, and Compact Spaces, Smart Boost for Versatile Heating, Simple Installation by ariston
- **How much does it cost?** $894 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/139419372-4-gallon-capacity-120-volt-ariston-andris-mini-tank-electric)

## Best For

- ariston enthusiasts

## Why This Product

- Trusted ariston brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Powerhouse:** Sleek 14.25" wall-mount fits tight spaces like under sinks & RVs effortlessly.
- • **Versatile Installation:** Works standalone or as a booster to your existing system for ultimate flexibility.
- • **Energy Smart & Eco-Friendly:** 1440W efficient heating minimizes energy use while maximizing performance.
- • **Instant Hot Water, Zero Wait:** Say goodbye to cold water delays with on-demand 4-gallon storage.
- • **Durable Titanium Glass-Lined Tank:** Built to last with superior heat retention and corrosion resistance.

## Overview

The Ariston Andris Mini Tank Electric Water Heater is a compact, 4-gallon, 120V unit designed for under-sink, RV, and small-space applications. Featuring a durable titanium glass-lined tank and 1440W power, it delivers instant hot water with energy-efficient performance. Easy to install and versatile, it can function as a standalone heater or booster, making it a smart, eco-conscious upgrade for modern living.

## Description

4 Gallon Capacity, 120-Volt – Ariston Andris Mini Tank Electric Water Heater – Heating Solution for Under Sink, RV, and Compact Spaces, Smart Boost for Versatile Heating, Simple Installation - desertcart.com

Review: This is a life changer and a profound water conservation appliance - 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!!!
Review: Great product, easy to install, arrived quickly, and earlier than expected. - This is a great little heater. My camper came with one installed when I purchased it 8 years ago. No telling when that one was bought. Mine stopped working, so I got a new one. It came with clear directions; easy to remove the old one and hook up this one to the already existing PEX piping, Watched several YouTube videos about this little heater before in stalling it myself. (female 73 yrs,) If one doesn't have the PEX piping, there are videos for that also. Mine lived a nice long productive life considering I have well water and did not know to flush it out once a year. It gives me instant hot steaming water at the sink, hot enough to make tea and instant coffee. I love it. I had the option to clean or replace the corroded heating rods, but considering the low price I simply replaced the entire heater.

## Features

- Compact and Versatile Design: The Ariston Mini-Tank Electric Water Heater is ideal for supplying heated water to single sinks in small spaces like RVs and under sinks. Its compact design fits seamlessly in tight spaces for convenience.
- Powerful Heating Solution: Equipped with a titanium glass-lined tank for durability and optimal heat retention, this water heater provides on-demand heated water without the need for large commercial tanks, making it efficient for home and RV use.
- Versatile Installation Options: This product bundle can be installed as a stand-alone unit or as a booster to an existing hot water system, ensuring a consistent supply of heated water where it’s needed most. Considerable for sinks, garages, and remote areas.
- Energy-Saving and Convenient: With a plug-in design and comfortable installation process, this electric water heater minimizes energy usage while maximizing performance. It’s a smart solution for reducing energy consumption without compromising water supply.
- Why Choose Ariston: Ariston is a globally trusted brand known for innovative heating solutions and high-quality materials. By investing in Ariston products, you ensure exceptional performance, energy efficiency, and a commitment to sustainability in every aspect of your heating system.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07RS4VL8L |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #22,968 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #20 in Water Heaters |
| Brand | Ariston |
| Color | Silver |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,731) |
| Date First Available | May 15, 2019 |
| Efficiency | Energy Efficient |
| Included Components | 4 gallon water heater |
| Is Electric | Yes |
| Item Weight | 22.2 pounds |
| Item model number | ANDRIS RS 4U 1.4KW |
| Manufacturer | Ariston |
| Mounting Type | Wall |
| Part Number | ANDRIS RS 4U 1.4KW |
| Product Dimensions | 14.25"W x 14.25"H |
| Size | 4 Gallon |
| UPC | 763160007196 |
| Voltage | 120 Volts |
| Wattage | 1440 watts |

## Product Details

- **Brand:** Ariston
- **Capacity:** 4 Gallons
- **Color:** Silver
- **Power Source:** AC
- **Product Dimensions:** 14.25"W x 14.25"H

## Images

![4 Gallon Capacity, 120-Volt – Ariston Andris Mini Tank Electric Water Heater – Heating Solution for Under Sink, RV, and Compact Spaces, Smart Boost for Versatile Heating, Simple Installation - Image 1](https://m.media-amazon.com/images/I/51+JCCJkhIL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ This is a life changer and a profound water conservation appliance
*by C***A 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!!!

### ⭐⭐⭐⭐⭐ Great product, easy to install, arrived quickly, and earlier than expected.
*by M***E on February 28, 2025*

This is a great little heater. My camper came with one installed when I purchased it 8 years ago. No telling when that one was bought. Mine stopped working, so I got a new one. It came with clear directions; easy to remove the old one and hook up this one to the already existing PEX piping, Watched several YouTube videos about this little heater before in stalling it myself. (female 73 yrs,) If one doesn't have the PEX piping, there are videos for that also. Mine lived a nice long productive life considering I have well water and did not know to flush it out once a year. It gives me instant hot steaming water at the sink, hot enough to make tea and instant coffee. I love it. I had the option to clean or replace the corroded heating rods, but considering the low price I simply replaced the entire heater.

### ⭐⭐⭐⭐⭐ Great little water heater
*by D***Y on September 18, 2025*

I bought this 2 years ago for a bathroom in a detached garage we were building. This works great for this bathroom, easy to mount up on the wall or under the vanity if needed. Started up fine, easy to adjust the temperature, and has worked with no issues for 2+ years now.

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-01-24*