Water Heater Singapore
Reason for the Callout
The homeowner discovered corrosion and water leakage on the existing Ariston water heater and engaged Homeone for assessment and a full replacement.
HDB
Ariston Water Heater Corrosion: SL 20 Replacement at 2 Ghim Moh Road HDB
A severe “Ariston water heater corrosion” issue was found at 2 Ghim Moh Road HDB. Homeone replaced the failed unit and rectified all non-compliances in accordance with PUB standards.
Before: Ariston SL 20
After: Ariston SL2 20 RS
Date Of Replacement: 4 Mar 2025
Project Location: Ghim Moh Road
Before Replacement:
The Ariston SL 20 showed signs of severe corrosion and internal leakage. Safety fittings like the double check valve and electrical bonding were missing, violating PUB and Singapore standards.
After Replacement:
We replaced the corroded heater with a compliant Ariston SL 20 RS model and added all missing fittings, ensuring the system is now safe and PUB-compliant.
Inspection Findings 
- Rust and corrosion are visible around pipe joints and the tank base.
- Internal leakage from the heater tank.
- Missing electrical bonding – Violation of SS CP5:1998 Clause 413-02
- Missing double check valve – Violation of SS636
New Components Replacement
- Ariston SL 20 RS heater
- Double check valve
- Stop valve
- Stainless steel piping
- Electrical bonding cable
Replacement work scope:
- Removed the old, corroded Ariston unit.
- Installed new Ariston SL 20 RS heater.
- Added double check valve to prevent backflow contamination.
- Installed proper electrical bonding as per CP5 standards.
- Installation of stainless steel drain pipe
- Electrical bonding for safety
- Ensured complete leak testing and safety validation.
- The PUB compliance submission
Our PUB Licensed Plumber has endorsed that the work is done in accordance with the conditions stated below:
- 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.
- The proposed works shall not adversely affect the existing water supply reticulation system.
- The 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 in preventing backflow and the back-siphonage of water from the storage water heater through the heater inlet pipe, and will be safe for use.
Conclusion:
The replacement of the “Ariston water heater corrosion” case was completed safely and professionally by Homeone’s technician, under the supervision of a licensed PUB plumber. All work complies with SS636 and CP5:1998, and PUB submission was duly completed upon finishing.