Water Heater Singapore
Reason for the Callout
An Ang Mo Kio HDB water heater was experiencing leaks and rust, making it unreliable. To restore consistent hot water, the owner opted for a replacement with the same brand and engaged Homeone for a safe, compliant installation. With Homeone’s expertise, the HDB now has a properly installed and dependable water heating system.
HDB
Ang Mo Kio HDB Water Heater: Joven JH25 Replacement at Blk 617 Ang Mo Kio Ave 4
The ageing Joven JH25 water heater was due for replacement. We installed a new Joven JSH25, ensuring a safe and reliable hot water system. The installation of the Ang Mo Kio HDB water heater was completed with all necessary safety upgrades, and a PUB Certificate was issued for full compliance.
Before: Joven JH25
After: Joven JSH25
Date Of Replacement: 16 Aug 2024
Project Location: 617 Ang Mo Kio Ave 4
Before Replacement:
The existing Joven JH25 had exceeded its lifespan and was no longer functioning properly. It also lacked essential safety features, such as a double check valve to prevent backflow and electrical bonding to reduce the risk of electrocution.
After Replacement:
A new Joven JSH25 was installed at the same location, this time with all required safety enhancements, including a double check valve for anti-backflow protection and equipotential bonding for electrical safety. The installation complies fully with PUB and regulatory standards and is covered by a one (1) year workmanship warranty from Homeone, in addition to the manufacturer’s warranty for the unit.
Inspection Findings 
- Visible tank body corrosion and water leakage
- Intermittent hot water output
- No double check valve, and no drain pipe
- No electrical bonding
Components Replaced for PUB Submission Compliance:
- Joven JSH25 electric vertical water heater
- Anti-vacuum valve at hot outlet (required for vertical tanks)
- PUB-approved double-check valve on cold inlet
- Stainless steel inlet and outlet piping (≤1m)
- Stop cock / control valve for maintenance shut-off
- Compression fittings, elbows, brackets, and wall anchors
- Electrical bonding cable to the nearby metal pipe for safety
Replacement work scope:
- Isolated power and water supply
- Removed the existing Joven JH25 and cleared the installation area
- Inspected the wall, pipe layout, and drainage route
- Installed the new Joven JSH25 in the same vertical configuration
- Fitted anti-vacuum valve per Rheem specifications
- Installed PUB-compliant double-check valve and stop cock
- Replaced old copper pipes with stainless steel pipework within 1 metre
- Connected and tested electrical bonding to ensure proper grounding
- Performed full leak testing and pressure checks
- Submitted all documentation for PUB review and issued a valid PUB Certificate
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:
This project at Ang Mo Kio shows that even a same-model water heater replacement requires full attention to safety and compliance. Our team installed a new Joven JSH25 with all required upgrades and issued a valid PUB Certificate, ensuring the system is safe, traceable, and fully compliant with Singapore’s plumbing and electrical regulations.