24 Jun 2025

Castle Green

Water Heater Corrosion Replacement: Rheem 65SVP10S to Joven JSH35 at Castle Green on 23 Jun 2025

A homeowner at Castle Green Condominium reached out to Homeone after noticing water dripping down their bathroom wall and discolouration near the ceiling panel. Upon inspection, our technician discovered a clear case of "water heater corrosion"—the existing Rheem 65SVP10S unit had rusted through the tank wall and was actively leaking. From the before photo, extensive rust is visible across the tank base and lower casing, with signs of long-term corrosion. The damage extended beyond the heater itself—metal pipe fittings had oxidised, and brown streaks were running down from the heater casing to the false ceiling, posing a high risk of electrical damage and internal water seepage.

Project location
Castle Green
Property type
Condominium

Before

Replacement of a Rheem 65SVP10S water heater to resolve heater problems end of service life.

After

The Joven JSH35 has been newly installed to the existing water heater system, with all connecting pipework made of stainless steel. The installation includes a new stop valve, double check valve, drain pipe, electric bonding, and 2.5mm² wire, and a submission has been filed to PUB to ensure safety and compliance with PUB regulations. Additionally, Homeone offers a 1-year warranty on this installation, complementing the manufacturer's warranty, ensuring peace of mind and reliable service.

Table of Contents

Water Heater Corrosion Replacement: Rheem 65SVP10S to Joven JSH35 at Castle Green

Old Water Heater:

Rheem 65SVP10S

Old Water Heater:

joven JSH35

Site Findings

Water Heater Rusty tank body with active leaks
Brown rust stains are visible near the inlet and tank seams
No drain pipe – water discharged unsafely into the open
No double check valve or approved backflow device (violation of SS636)
No electrical bonding, violating CP5:1998 safety standards

Proposed Solution

Homeone proposed the full removal of the corroded Rheem unit and replacement with a modern Joven JSH35 horizontal water heater (35L). To prevent future overflow incidents, a new exposed stainless steel drainpipe was installed, bypassing the blocked internal drain line for safe pressure relief discharge.

We also carried out a full PUB-compliant installation:

New double check valve to prevent backflow (SS636)
New stop valve and stainless steel pipes within 1 metre
Electrical bonding for CP5 Clause 413-02 compliance
Safe routing of an exposed drainpipe to the nearest trap

Work Scope for Water Heater Corrosion Replacement

Dismantling & Assessment

Isolated power and water supply
Removed rusted Rheem 65SVP10S unit
Cleared debris and corroded pipework

Installation of Joven JSH35

Mounted the new 35L heater horizontally
Installed stainless steel hot/cold piping and fittings
Connected exposed drainpipe for safe water discharge
Fitted check valve, stopcock, and applied electrical bonding

Testing & Commissioning

Leak testing and pressure validation
Bonding continuity check
Verified safe operation of temperature relief valve and new drainage line

Documentation

Submit the required documents to PUB by a PUB-licensed plumber

Conclusion

This water heater corrosion case at Castle Green Condo was a serious safety concern, with active leakage, blocked drainage, and tank rust threatening further ceiling damage. Homeone successfully resolved the issue by replacing the corroded Rheem heater with a Joven JSH35 model and installing a fully PUB-compliant exposed drainpipe for long-term reliability.

All works were performed under the supervision of a PUB-licensed plumber and EMA-certified electrician, ensuring maximum safety and peace of mind for the homeowner.

Project Location: Castle Green

Castle Green