Water Heater Singapore
Reason for the Callout
The customer reported leaking and visible corrosion at the tank body under the hot water outlet.
HDB
Rheem Water Heater Corrosion: Rheem 85VP6S Replacement at 833 Yishun Street 81 HDB
A house owner at 833 Yishun Street 81 HDB experienced water heater corrosion and requested a compliant Rheem 85VP6S replacement.
Before: Rheem 85VP6S
After: Rheem 85VP6S
Date Of Replacement: 3 Feb 2025
Project Location: Yishun Street 81
Before Replacement:
The homeowner reported signs of corrosion and leakage from their existing Rheem 85VP6S storage heater. The unit had reached the end of its service life, and warranty coverage had expired. No backflow prevention or anti-vacuum safety valves were present in the original setup.
After Replacement:
We replaced the old Rheem 85VP6S with a new unit of the same model, now professionally fitted with an anti-vacuum valve and double check valve. The installation met PUB safety standards. Electrical bonding, drain piping, and new isolation valves were added. No more leaks after the upgrade.
Inspection Findings 
- Corroded Tank– may leak, contaminate water, or burst under pressure, posing safety, hygiene, and property damage risks.
- No Anti-Vacuum Valve- Without an anti-vacuum valve, the tank may deform or siphon dirty water back into the system during pressure drops.
- No Check Valve– Without a check valve, backflow may contaminate the main supply and breach PUB safety and installation regulations.
New Components Replacement
- Anti-Vacuum Valve– It ensures that air can enter the system when necessary.
- Double Check Valve – Prevents backflow contamination
- Drain Pipe – Safely channels overflow water
- 2.5mm Cable – Provides essential electrical bonding
- Earth Bonding – Ensures electrical safety
- Gate Valve – Allows shut-off for maintenance
Replacement work scope:
- Dismantled and disposed of the corroded Rheem 65SVP10S
- Supplied and installed a new Rheem EH-40M
- Installed new gate valve and stainless steel pipework
- Carried out earth bonding with 2.5mm cable
- Double-check valve installation and the drainpipe installation
- Final testing for the temperature of the hot water pipe. Pressure testing for both hot and cold water.
- PUB compliance submission upon completion
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 entire installation was performed by a Homeone-trained technician and supervised by a PUB-licensed plumber. Following completion, our licensed plumber submitted the installation to PUB as per the Public Utilities Act 2001. The new heater system is fully compliant with PUB regulations.