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2 Feb 2024

Joven JH50 Water Heater Replaced With Ariston PRO RS J 25 Water Heater at the landed house situated at 12 Chuan Link on 2 Feb 2024

The Joven JH50  Water Heater project is mandatory to comply with Section 40G of the Public Utilities Act 2001, which requires all storage installations to be submitted to the Public Utilities Board (PUB) for an Acknowledgement of Authorized Heater Replacement. This ensures that the installation meets all relevant regulations and standards, providing peace of mind regarding the safety of the installation. By complying with this requirement your storage water heater installation is authorized and safe to use. Let PUB ensure that your installation meets all necessary requirements and protects you.

  • Project location

    Chuan Link

  • Property type


Joven JH50 Water Heater


Replacement of Joven JH50 Water Heater to resolve heater problems end of service life.


Ariston PRO RS J 25 Water Heater is the new installation. All pipe works connecting to the heaters are stainless steel. Following the manufacturer's specifications, a new approved stop valve and double-check valves are employed. Such will comply with PUB Regulations. Our Licensed Plumber has supervised and approved the installation. There is a 1-year warranty by Homeone for this installation on top of the warranty provided by the manufacturer. There is a 1-year warranty by Homeone for this installation on top of the warranty provided by manufacturer.

The final result

Joven JH50 Water Heater Replacement

Old water heater:

Joven JH50 Water Heater

Joven is a well-established brand with over 35 years of history.
They started out in 1983 and made their way to the top in the water heater industry.
The company is a manufacturing company for the JOVEN brand of water heater.
Their products are designed with quality thoughts for the end-user in line.
Type: The Joven JH50 is a storage water heater, which means it has a tank to store heated water.
It typically operates by heating water using an electric element and storing it in the tank until it’s needed.
Efficiency: The efficiency of the Joven JH50 water heater would depend on various factors such as insulation, thermostat control, and energy source.
Electric water heaters like the JH50 are generally considered efficient in converting electricity into heat energy.
However, the overall efficiency may vary based on usage patterns and the quality of insulation in the tank.
Safety Features: Most modern water heaters, including the Joven JH50L, come equipped with safety features to prevent accidents such as overheating, electric shocks, or pressure build-up.
These safety features may include:
Thermostat control: This helps regulate the temperature of the water to prevent overheating.
Pressure relief valve: This valve releases excess pressure from the tank to prevent explosions or leaks.
Thermal cutoff: In case of overheating, this feature shuts off power to the heating element to prevent damage or fire.
Insulation: Proper insulation reduces heat loss and prevents the exterior of the water heater from becoming dangerously hot.
Grounding: Ensures that the water heater is properly grounded to prevent electric shocks.

New water heater:

Ariston PRO RS J 25 Water Heater

Ariston deserves to be called one of the best water heater brands.
As the number one water heater brand from Italy, Ariston offers a variety of electric and gas water heater products that are safe and comfortable to use.
The Ariston PRO RSJ 25 Water Heater is a product of Ariston Thermo Group, a global leader in heating and water heating solutions.
Here’s an overview of its type, efficiency, and safety features:
Type: The Ariston PRO RSJ 25 Water Heater is likely a storage tank water heater.
These heaters store hot water in an insulated tank until it’s needed.
This type of water heater is common in residential and commercial settings.
Efficiency: Efficiency in water heaters is often measured by the Energy Factor (EF).
The Ariston PRO RSJ 25 may have a high EF rating, indicating its efficiency in converting energy input into hot water output.
It might also incorporate features such as insulation to minimize heat loss from the tank, further enhancing its efficiency.
Safety: Water heaters typically come with various safety features to prevent accidents and ensure user safety.
Some common safety features may include:
Temperature and pressure relief valve: This valve releases excess pressure or temperature buildup inside the tank to prevent explosions or damage.
Overheat protection: This feature shuts off the heater if the water temperature exceeds a certain limit, preventing scalding or damage to the unit.
Flame failure protection: If the heater operates on gas, this feature ensures that the gas supply is shut off if the flame goes out, preventing gas leaks.
Corrosion resistance: Water heaters are often equipped with materials and coatings that resist corrosion, prolonging the lifespan of the unit and preventing leaks.
Compliance with safety standards: The Ariston PRO RSJ 25 Water Heater likely complies with relevant safety standards and certifications to ensure its safe operation.


This heater unit has met the following requirements for a water heater:

Work Scope:

1. Supply of tank, pipe and fittings
2. Removal of old tank
3. Pipe works partial redo to comply PUB
4. New tank installation
5. Testing and commission. Submission to PUB
6. Clean up before leaving
7. PUB approval letter

Regulatory Compliance:

The electric water heater as a whole unit (i.e. parts incorporated in the water heater itself such as heating element, pressure relief valve/temperature relief valve, water tank, etc. shall be tested in accordance with the following:

  1. AS/NZS 4020:2018 Appendix K – Sample extraction procedure for use with water heating system.
    An accredited or non-accredited test report for Appendix K is acceptable provided that the test laboratory is accredited by Singapore Accreditation Council (SAC) to AS/NZS 4020:2018 Appendix H on Extraction of Metals, at the point of testing;
  2. The samples extracted in accordance with Appendix K shall then be tested in accordance with AS/NZS 4020:2018 Appendix H – Extraction of metals (for metallic materials in contact with water).
    The maximum allowable concentrations of metals listed in Table 2 of AS/NZS 4020:2018 shall not exceed the limits specified by the World Health Organization (WHO) Guidelines for Drinking Water Quality.


Reason for the Replacement: End of service life

Our  licensed water service plumber has ensured that work is done in accordance with the conditions stated below:

  1. All water service installations must be in accordance with the Public Utilities (Water Supply) Regulations, Singapore Standards 636 for Water Services and all other relevant statutory requirements.
  2. The proposed works shall not adversely affect the existing water supply reticulation system.
  3. Proposed water storage heater is installed in accordance with the specifications and requirements of the manufacturer.
    The installation of double check valves is safe and effective to prevent backflow and the back siphonage of water from the storage water heater through the heater inlet pipe and will be safe for use.


In conclusion, the Ariston PRO RS J 25 Water Heater is a high-quality and reliable product that meets all necessary regulatory requirements.
The installation was carried out in compliance with PUB regulations, ensuring the safety and effectiveness of the new water heater.
We are pleased to inform that we have received the PUB Approval Letter for the installation.
This letter means that PUB has a record of this heater replacement job it is authorized.


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