Rubine Water Heater Singapore


Google Rating
Based on 801 reviews
  • Expert Installation with PUB Submission: All of the storage water installation works comply with standards prescribed / stipulated by PUB.
  • Water Heater Experts: With more than 10 years of experience, our water heater installation services are highly recommended and reputable..
  • One-Stop Water Heater Services: We provide one-stop supply and install services for our clients, saving them the hassle of liaising with multiple contractors.
  • Wide Range of Water Heater Brands: We are able to supply a wide range of water heater brands includes Ariston, Rheem, Joven, Rubine, 707, and more, for our customers to pick the suitable choice.

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Rubine is a leading and established Italian brand in the bathroom and kitchen industry. Within a span of 15 years, Rubine has built a strong presence in many markets in the region. Known for its contemporary design, functionality and quality. Rubine continues to develop products which embellish customers’ homes and offers practical benefits.

Rubine RWH-1388 and RWH-2388


Rubine Water Heater Products

Why Choose Us

Expert Installation with PUB Submission

Quality workmanship to ensure that all works comply with standards prescribed / stipulated by PUB


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

Receive Recommendations

Every customer has different needs, so we ensure that our recommendations best fit your needs

Our Past Rubine Projects


Residential  |  HDB Tampines

Instant Water Heater Replacement

Replacement Model: RWH-1388

Local Manufacturer’s Warranty (By Rubine)

* 1 year warranty on heater parts and service.

* 5 years warranty on heating element and inner tank.

Works Completed Under PUB Standards and Specifications

* Additional 30 days workmanship warranty.

Residential  |  Condo Bukit Timah

Instant Water Heater Replacement

Replacement Model: RWH-1388

Local Manufacturer’s Warranty (By Rubine)

* 1 year warranty on heater parts and service.

* 5 years warranty on heating element and inner tank.

Works Completed Under PUB Standards and Specifications

* Additional 30 days workmanship warranty.


Residential  |  HDB Bukit Panjang

Instant Water Heater Replacement

Replacement Model: RWH-1388

Local Manufacturer’s Warranty (By Rubine)

* 1 year warranty on heater parts and service.

* 5 years warranty on heating element and inner tank.

Works Completed Under PUB Standards and Specifications

* Additional 30 days workmanship warranty.

Choose Water Heater City Singapore


Google Rating
Based on 801 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!

We are PUB Licensed (PUB License No: WS17962021)

With years of experience and trusted by 1000s of customers, our team of plumbers are capable of performing expert installation of Storage Water Heaters with PUB submission. All the storage water installation works comply with standards prescribed / stipulated by PUB.

Unlicensed Installation will VOID Rubine Warranty

The warranty does not cover any faults caused by accidental damage, misuse, improper installation or use, non-compliant water supply, unauthorized repairs or modifications, faulty plumbing or power supply, failure to maintain, transport damage, wear and tear, cosmetic defects, or consequential loss due to leakage or other failures.

Warranty & Safety

PUB Regulation

Based on Public Utilities (Water Supply) Regulations, regulated water service and sanitary works can only be carried out by Public Utilities Board (PUB) Licensed Plumbers.

PUB Submission

Common examples of water service works carried out by the licensed plumbers include installation/replacement of electric storage water heaters. Doing so without a license is illegal and punishable by fines or imprisonment.

Warranty Issues

Most water heater brands require the water heater to be installed by a licensed plumbing company or authorized service personnel to validate the warranty. Otherwise, the warranty may be null and void.


Safety Hazards

Water heaters can cause leaks, explosions, fires, electrocutions, or other hazards if not installed correctly by qualified and experienced professionals.

PUB Submission

  • Please be informed that PUB submission is compulsory for storage water heater works, which applies to all storage water installation and/or replacement works. This is to ensure that all works are done as per PUB regulation.
  • As part of the PUB submission process, all necessary valves and pipings will need to be installed as per PUB requirements. This might result in the modification of existing piping and/or additional piping being installed.
  • PUB submission is also required as per warranty terms and conditions from all manufacturers. Failure to comply will result in the warranty for the heater to be void.

Why Are Rubine Instant Water Heaters Popular With Homeowners?

Installed water heaters are something that you will undoubtedly find in every home in Singapore. The Rubine water heater is a brand that is becoming immensely popular in Singapore. There are many reasons why are Rubine instant water heaters popular with homeowners – the reasons are listed down below.



If you opt for a Rubine instant water heater, comfort is something that you will always enjoy. The water heaters have been designed in a way that you shall always get as much hot water as is good enough for you to enjoy a relaxing bath.



Innovation is something that Rubine is popular for in Singapore. It believes in offering durable and high-quality products. The water heaters have been designed with an ergonomic approach with the latest technology that has been incorporated to make sure the water heater is always performing at optimal levels.


Another thing that everyone likes about the Rubine water heater is that it comes with in-built added safety functionality.  A Rubine instant water heater will detect any signs that indicate that your water heater becomes faulty. If it finds an error, its alarm will go off, making you aware of the potential danger.


Every Rubine instant water heater ensures top quality, irresistible elegance, and high functionality. This is why you will always notice that each of their products, including the Rubine instant heater like Rubine RWH-1388 which is of extremely high quality.



Rubine instant water heaters are significantly energy efficient. Groundbreaking technological innovations are used to make the heaters. This helps create the potential to improve the future, and together with it even enhances the present quality of life.

Due to the factors stated above, Rubine instant water heaters are not only popular with homeowners but Singaporeans are opting to install a Rubine instant water heater in their homes. 


Why Singaporeans Choose To Install Rubine Instant Water Heaters?

Rubine instant water heaters are perfectly suitable for HDB units, and this is why the people of Singapore trust this brand. However, this is not the main reason why people in Singapore prefer installing a Rubine water heater.  Even commercial and residential plumbers suggest installing a Rubine instant water heater. Apart from its features, we will also get to know the two most popular Rubine water heater models, Rubine 1388 and Rubine 2388. 



One of the things that Rubine is known for is its innovation. It clearly reflects in every product, including their instant water heaters. The reason to opt for a Rubine instant water heater installation is that it is designed to the best standards.



Rubine water heaters offer high functionality, irresistible elegance, and the best quality. The important fact about installing Rubine instant water heaters is the build quality that you will surely love.  

Strong Water Flow

A point to note when you have installed a Rubine water heater is that you do not have to worry about the strong water flow. The AC booster pump of this heater creates an amazing water flow of up to +/-5 liter each minute.

Silent Inverter DC Pump

A feature you want to have in your water heater is the inverter DC technology. It reduces power consumption, energy usage, and it operates in a silent manner that allows you to enjoy the best showering experience.

Energy Saving


Since you will be using your water heater every day, you should know the significance of installing energy efficient water heaters. Rubine instant water heater helps save up to 60 percent energy.

Now that we are aware of the interesting features of Rubine instant water heaters, it is also important to know which type of shower will suit your demands – normal shower or rain shower?


Normal Shower vs Rain Shower – Rubine Water Heaters

Rubine is one of the most popular home appliance brands in Singapore since its products are designed for local weather and living conditions. Rubine instant heaters come along with either a normal shower or a rain shower. For example, the Rubine 1388 instant water heater with a normal shower while Rubine 2388 instant water heater comes with a rain shower. These are some of the more popular water heaters in the series.

Rubine instant water heaters have a thermo cut-off feature that will cut off the power supply when the temperature exceeds the safety limit to ensure that you enjoy hot showers. Each water heater is designed to work with a power supply of 230 volts and is rated at 3500 watts.

The water heater will only work when the water pressure is above 20 KPa and is designed to withstand maximum water pressure of 400 kPa. The heater is designed with IP25 protection against water. 

Rubine RWH-1338 Instant Heater 

Rubine 1338 electric instant water heater is the usual instant heater with a normal shower. This instant heater has all the features of basic heaters from the BOW series which are described above. The Rubine RWH-1338 instant water heater model is compact and refined, making it fit with any bathroom decor.  

Rubine RWH-2338 Instant Heater 

Rubine RWH-2388 rain shower instant water heater is an enhanced water heater since it comes with a rain shower, and has a booster pump to increase the water pressure. The water pressure is low at times, and this can affect the performance of the instant water heater. 

Importance of Booster Pumps


Usually, the water pressure in your home is low due to water supply-related issues. It is suggested to buy a new instant water heater from an installer that includes a booster pump to increase enough water pressure.



  • The main advantage of a booster pump is that you will never run out of a hot water supply. 
  • Improves energy efficiency of water heater since it consumes less electricity.
  • It is water-saving since hot water is always available, and cold water will not have to be wasted.

 Your Shower Choice


An installed water heater with a normal shower is best for cleaning since it has higher water pressure. On the other hand, a rain shower offers you a relaxing bath, although the pressure may be low and not all dirt can be removed. 

After deciding on either a normal or rain shower, it is also important to know the points to note when your Rubine water heater is taking too long to heat – this can help you consider if you need to replace or repair it.


Points To Note When The Rubine Water Heater Is Taking Too Long To Heat

There are times wherein you have to wait for quite a while for your Rubine water heater to heat thoroughly. When your heater is taking too long to heat up, it means that something is wrong with your Rubine water heater. Thus, you have to fix the issues to resume its functionality.  We have listed some points to note when the Rubine shower heater is taking too long to heat.


The distance between the installed water heater and the shower or faucet can affect the final water temperature. The reason why it takes more time for the hot water to reach the shower or faucet is owing to the longer distance.  

Low Volume Restrictor

Another factor that can also delay the hot water from reaching your shower or faucet is the water flow or volume. Most appliances such as the showerhead are designed to operate under low water pressure. As a result, volume restrictors are installed to reduce the volume of water coming through that feature.  

Failing Water Heater

A water heater is usually nearing its lifespan about 8 to 10 years old. It will start experiencing difficulties, hence becoming inefficient at heating water. A
faulty water heater will take longer to heat your water, which results in delayed hot water flow. 

Sediment Buildup

One of the major problems that Rubine water heaters are facing is sediment buildup. The accumulated sediment leaves a small space in the tank for the heater water after a while.  

Undersized Water Heater


You are maybe underestimating your current need for hot water in your home. An example would be if the current water heater was installed several years ago when the need for hot water was limited.  

Water In Pipes


One more reason why you are experiencing delays before hot water comes out of your showerhead or faucet is that there is already cold water sitting in the pipe. If you switch on the faucet, water starts to flow.

It is important to know the factors to look out for when your Rubine water heater is taking too long to heat. If the issue prolongs over time, it might be one of the signs that the Rubine water heater should be replaced.


Signs That You Should Replace Your Rubine Storage Water Heater

Just like any other appliance, your Rubine water heater will completely malfunction one day. Before that happens, you should be aware of the signs that you should replace your Rubine water heater. We shall share these signs with you right away.


You can expect your Rubine water heater to last you for around 10-12 years. Your water heater’s longevity will depend on the anode rod and annual water heater maintenance. The anode rod protects the interior parts of your tank by creating electrolysis.  

Signs of Corrosion


As mentioned above, when the anode rod malfunctions, electrolysis will happen, and the corrosive particles will damage the interiors of your tank. Eventually, this will be noticeable on the exterior jacket of your Rubine water heater.

Difference in Heating Capacity


Is your Rubine water heater not producing as much hot water as it was used to? If yes, then there is a heating capacity issue. Your heater may also take longer to heat water up than usual after a while.  

Water Heater Leaks


If there is water around the place where you have installed your water heater then this is a reason to worry. Once you detect this specific type of water heater leak, then it can be due to a rusted or cracked water heater tank. In either case, you must have a new water heater installed. Furthermore, if your water heater’s relief pipe is continuously dripping, then you need to pay attention. This can be due to a damaged pressure relief valve or your water heater is over-firing. 

Higher Energy Bills


Your Rubine water heater’s energy efficiency will not be the same as before, after a while. You will notice your energy bills have increased. If your heater is already more than 10-12 years old, then it will be best to replace it with a new instant water heater or storage water heater

Running Out Of Hot Water Faster Than Used To


Over time, sediment starts building up in a water heater, which reduces the amount of water that is heated and stored. If you are not getting enough hot water for a proper shower, then this is a sign that suggests you might want to get a water heater replacement instead of a water heater repair, as you will have water heater failure anytime soon. 



If you are looking to install a Rubine water heater for your home, do consider the points above (e.g., normal shower vs rain shower, quality, safety) to opt for the one that meets your household demands. As Rubine water heaters are energy efficient, you can also save on your monthly utility bills. However, if you are a homeowner that already installed a Rubine water heater in your home, it is also important to know the various factors that affect your water heater’s heating time – this can help you decide if you need to repair or replace your water heater. Should you require professional water heater services to install your Rubine water heater, do contact Water Heater City Singapore.


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 Rubine Instant Water Heater Singapore HDB Bukit Batok



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

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Rubine Instant Water Heater Installation Water Heater Singapore Condo – Orchard

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