Instant Water Heater Installation / Replacement Service


Google Rating
Based on 815 reviews
  • Instant Heater Experts: With more than 10 years of experience, our instant heater installation services are highly recommended and reputable. Installation works are carried out by well-trained and highly experienced specialists.
  • One-Stop Instant Heater Services: We provide one-stop instant heater supply and installation services for our clients, saving them the hassle of liaising with multiple contractors.
  • Wide Range of Instant Heater Brands: We are able to supply a wide range of instant heater brands includes Ariston, Rheem, Joven, Rubine, 707, and more, for our customers to pick the suitable choice.

Just 3 Steps to Install New Instant Heater

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Schedule An Appointment

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Why Choose Us


We pride ourselves with transparent pricing so that you know exactly what you are paying for

Receive Recommendations

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Quality Assurance

Professional technicians will complete the water heater installation with guaranteed quality workmanship

Best Selling Instant Heater Brands

Our Instant Heater Products


Our Instant Heater Installation Projects

Residential  |  HDB Bishan

Instant Heater Installation

Replacement Model: Champs Accord Instant Heater

Local Manufacturer’s Warranty (By Champs)

* 2 years warranty for heater parts.

* 5 years warranty for heating element.

Works Completed Under PUB Standards and Specifications

*Additional 30 days workmanship warranty.


Residential  |  HDB Bukit Batok

Instant Heater Installation

Replacement Model: Rubine RWH-1388 Instant Heater

Local Manufacturer’s Warranty (By Rubine)

* 1 year water leakage and internal parts warranty.

Works Completed Under PUB Standards and Specifications

*Additional 30 days workmanship warranty.

Residential |  HDB Toa Payoh

Instant Heater Installation

Replacement Model: Rubine RWH-1388 Instant Heater

Local Manufacturer’s Warranty (By Rubine)

* 1 year water leakage and internal parts warranty.

Works Completed Under PUB Standards and Specifications

* Additional 30 days workmanship warranty.


Residential |  HDB Bukit Merah

Instant Heater Installation

Replacement Model: 707 Compact Instant Heater

Local Manufacturer’s Warranty (By 707)

*1 year warranty for the heater parts.

Works Completed Under PUB Standards and Specifications

* Additional 30 days workmanship warranty.

Frequently Asked Questions (FAQ)

What Are The Popular Water Heater Brands in Singapore?

The 3 most popular water heater brands are Ariston from Italy, Joven from Malaysia and Rheem from the US.

Other well-known heater brands in Singapore are 707, Champs and Rubine.

You can learn more about why Ariston, Joven and Rheem emerge as the top water heater brands.

How Do I Select Between Storage and Instant Water Heaters?

A storage water heater heats up cold water and stores it in its insulated tank to keep it warm for a period of time. It also reheats it occasionally when the temperature drops.

As a result, a storage water heater typically uses up more energy than an instant water heater.

Storage heaters also take up a lot of space due to its bulky size, capable of storing 30 to 100 litres of water.  Instant water heaters are more compact and heats up water on-demand. 

Whether you choose an instant or a storage water heater mostly depends on your budget, your household’s water consumption, your showering habits, and your preferred bathroom aesthetic.

Learn more about the differences between a storage and instant water heater to help you decide!

What Should I Take Note of During A Water Heater Installation?

Before installing a water heater, take these preliminary steps to minimise any installation errors:

  • Identify and locate the best place for your water heater
  • Check the water supply route
  • Test the appliance after installing the water heater

For more detailed steps, read our article on things to note during a water heater installation.

When Should My Water Heater Be Replaced?

If your water heater is showing signs of failure like leaking, rusting, sparking or not producing hot water, it is time to replace your water heater for your safety. If the device is more than 10 years old, it is advised to replace it.

Choose Water Heater City Singapore


Google Rating
Based on 815 reviews

Water Heater City Singapore offers complete water heater services such water heater installation, water heater repair, and water heater leaking services. We provide one-stop supply and installation services for instant water heaters and storage water heaters. Our range of water heater brands includes Ariston, Rheem, Joven, 707, Rubine and more! If you are looking to replace your water heater or install or new heater, do not hesitate to WhatsApp us at +65 8241 0032 for a quick consultation!

Reasons To Opt For Instant Water Heater Installation

If you want to install an instant water heater at your home but do not know what it can benefit you and even the cost, it is important to get in touch with a water heater installation provider. Here are some of the reasons to opt for instant water heater installation:

Enjoy Instant Supply of Hot Water


Ideally, you will not like waiting for too long to have hot water supplied in your house, which can otherwise interrupt your day-to-day routine. For that very reason, instant water heaters are designed to provide hot water throughout the day.

Endless Hot Water


With instant water heaters such as the Ariston SMC33 instant water heater and Rubine RWH 1388, you are confident of an endless supply of hot water throughout the day.

Higher Energy Savings

Due to energy inefficient appliances, your energy consumption will be higher. This can be avoided with instant water heaters since they are designed to heat water only when necessary.

Long Lifespan


Indeed, no one wants to replace or repair water heaters often, that is why instant water heaters are designed to last longer. With proper maintenance, these instant heaters can last for over 20 years, unlike storage water heaters whose maximum lifespan is less than 12 years.

Clean water

One of the basic needs is clean water and installing a water heater can be the real game-changer for that matter. This is particularly true because instant heaters do not hold water.

If you have made up your mind and decided to have a Rubine instant water heater installation. Make sure to also check out the things to note before having an instant water heater installed so you will not make any mistakes.


Things to Note Before Having an Instant Water Heater Installed

There are several benefits of installing an instant water heater at your property. However, there are things to note before having an instant water heater installed.



Compared to a storage water heater, an instant water heater is relatively smaller, effective, and energy-efficient. The instant water heater does not have a storage tank for water holding since the water is heated once you open the hot water faucet.

Hot water usage patterns


One of the critical considerations when choosing instant water heaters over a storage water heater is your hot water usage patterns. For instance, an installed Ariston instant water heater should be measured according to your hot water usage at a given moment.



A reason to opt for an instant water heater installation is due to the long-term benefits exceeding the short-term benefit of lower installation cost. As instant water heaters are more energy efficient; you will be saving on your utility power bills.

Current water heater

Your current water heater setup is another factor to consider when installing an instant water heater. The installation cost can increase significantly, especially if you hire plumbers, electricians, and other contractors.


Many property owners opt to install instant water heaters into their property. They look for a water heater that can help reduce energy consumption and their monthly utility bill – one of the significant factors of installing an energy-efficient water heater

Your water heaters can also have issues overtime, and it may not be able to produce hot water as it should. Take note of the reasons why your instant water heater is not hot. 


Why Is My Instant Water Heater Not Hot?

There is nothing as refreshing as a hot shower. Still, it can be very disappointing when your instant water heater breaks down and produces lukewarm warm water. However, before that, it will be helpful if you understand why your water heater is not hot in the first place.

Tripped Breaker


The chances are that a breaker trip may have led to your water heater losing its power source which is a water heater problem. If this has happened, then the water present in your tank will start cooling down, transforming it from hot to cold.

Incorrectly Set Thermostat

There are ways to optimize your water heater as well as save money, many people lower the thermostat on instant water heaters. To do this, check the thermostat on the instant water heater and set it to the right temperature.

Broken Thermostat


For instance, even after turning the thermostat up on your water heater and the water still does not reach the desired temperature, then perhaps, it is a sign that your water heater is faulty – due to a broken thermostat.

Defective Parts

The elements found in the electric water heater are important components of instant water heater tanks. If one of them has become faulty, then your water heater will not work as effectively.

Leaking Tank

Though this may not be visible to you, there may be a water heater leakage in your tank. If you are unsure about the reason behind this water heater leak, then do engage a water heater professional right away.

Worn Out Water Heater


An instant water heater normally can last for around ten years as its maximum lifespan. The older they get, the more they start wearing out, and thus, they do not heat your water as effectively.

As said above, cold water from instant heaters can be because of leaks. Hence, you should take note of the causes of instant water heater leaks.


Causes of Instant Water Heater Leaks

Instant water heaters offer hot water on demand as they do not store any water. Therefore, we sense that no issues will occur like leaks. However, there are still several causes of instant water heater leaks, and we have listed the possible reasons below.

Improper Venting

If you try to do the venting by yourself and it is improperly done, then your water heater will suffer from leaks, and the entire system may break down.

Rust or Sediment Inside The System

If you notice that your instant water heater is leaking from the main part and not through the adjacent pipe, then there might be rust or sediments inside. Once you notice a rust build-up, this is the time when you should replace your water heater.

Improper Water Pipe Connections


Another important fact you should know about instant water heaters is that they have an installed relief valve. If you do not have a valve, then pressure may develop inside the pipe joints that will cause your instant water heater to leak.

Acidic and Hard Water


A thing you didn’t know about water heaters is hard water due to water heater leaks. Hard water consists of dissolved particles that start to develop in the piping system after you have used it for quite a bit.

High Water Flow Rates


High pressure and high flow can develop in a water heater leak. Instant water heaters are more sensitive since they require low flow rates for optimal performance.

If you are worried about having your water heater replaced too soon because of these issues, then you should be aware of the factors that can affect your instant water heater’s lifespan.


Factors That Can Affect Your Instant Water Heater’s Lifespan

A water heater’s performance may decrease over time due to overuse. However, you can make it serve you for a longer time. Hence, we have listed down factors that can affect your instant water heater’s lifespan below:

Build Quality

Choosing a low-quality instant water heater cannot guarantee that it will last you for a long time.  Just like any other appliance, the higher the price of the water heater, the better the quality will be.

Water Pressure

High water pressure is bad for your instant water heater. It can cause system damage to the unit, decrease its working lifespan, and even notice the signs of a faulty water heater.



Proper points to note during a water heater installation also has a vital role to play. No matter how expensive or how good a brand your heater is, if it is not installed the right way. problems may occur.



The lifespan of your instant heater depends a lot on the way you use it. The reason why should you replace your water heater before it fails is due to the fact that huge amounts of water will increase the workload on your instant heater.



If you want your Ariston water heater, Rheem water heater or Joven water heater to last you for a very long time, it is necessary to opt for regular maintenance. You will need to engage a water heater professional to schedule regular maintenance for your water heater.



There are many reasons why instant water heaters are popular in Singapore. Not only are they energy efficient, but they can bring convenience to everyone in the household. If you are experiencing any troubles in the future, you should also be aware of why you should replace your instant water heater before it fails. There are benefits of buying an instant water heater from a reputable installer like Water Heater City Singapore can help you with your instant water heater replacement and installation. We give quality service with no hidden charges!


Water Heater City Singapore offers complete water heater services for both storage and instant water heater tanks including water heater installation and replacement, and water heater leak. We can provide the supply and installation or replacement of Singapore’s most popular water heater brands like Ariston water heater, Rheem water heater, Joven water heater, 707 water heater, Rubine water heater, and Champs water heater. If required, we are also able to open false ceiling, patch it back up and paint it to restore it to its original condition. We have over 10 years of experience for installation of water heaters and have done hundreds of water heater installation cases for landed, condo and HDB, including complete one-stop installation above false ceiling, plastering, and resealing false ceiling. We are a highly recommended Water Heater Services Company in Singapore, with many delighted customers and reviews over the years on Google and Facebook.  WhatsApp us at +65 8241 0032 for transparent quotations and honest pricing for all your water heater needs. We also provide a fast and efficient service to solve any of your water heater needs!



Case Study

Install Champs Ocean Instant Water Heater Singapore HDB – Bishan

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Rubine Instant Water Heater Installation Water Heater Singapore Condo – Bukit Timah

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Rubine Instant Water Heater Installation Water Heater Singapore HDB – Tampines

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Champs Instant Heater Installation Water Heater Singapore HDB – Punggol

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Rubine Instant Water Heater Replacement Water Heater Singapore – HDB, Choa Chu Kang

rubine-instant-water-heater-replacement-water-heater-city-singapore-hdb-choa-chu-kang-1   rubine-instant-water-heater-replacement-water-heater-city-singapore-hdb-choa-chu-kang-2