30 Jun 2025

409D Northshore Drive HDB

Ariston Water Heater Corrosion: AN2 30 RS Replaced with AL2 20 RS at 409D Northshore Drive HDB on 28 Jun 2025

A homeowner at 409D Northshore Drive HDB contacted Homeone after discovering water marks and rust streaks near the ceiling-mounted storage heater. The existing heater was reaching the end of its lifespan. Upon inspection, our technician confirmed a clear case of “Ariston Water Heater Corrosion.” The Ariston AN2 30 RS unit had begun corroding around the base and fittings, with signs of water leakage and oxidation.

In addition to the Ariston water heater corrosion, the original installation failed to comply with PUB regulations:

No check valve installed – which is required to prevent backflow contamination (SS636 violation)
No drainpipe from the pressure relief valve – risking uncontrolled discharge
No electrical bonding – breaching CP5:1998 Clause 413-02, increasing electrocution risk

These missing components compromised both water hygiene and electrical safety, making the replacement both necessary and urgent.

Project location
409D Northshore Drive HDB
Property type
HDB

Before

Replacement of a Ariston AN2 30 RSwater heater to resolve heater problems end of service life.

After

The Ariston SL2 20 RS 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

Ariston Water Heater Corrosion: AN2 30 RS Replaced with SL2 20 RS at 409D Northshore Drive

Old Water Heater:

Ariston AN2 30 RS

Old Water Heater:

Ariston SL2 20 RS

Site Findings

Clear signs of Ariston water heater corrosion at the tank outlet
Missing check valve, drainpipe, and bonding
Pipe joints showing signs of early rust and deterioration
The heater is at the end of its service life, requiring immediate action

Proposed Solution for Water Heater Rusty

Homeone replaced the corroded unit with a compact and modern Ariston SL2 20 RS water heater. Despite the limited ceiling access, the work was completed efficiently by one of our trained technicians under the supervision of a PUB-licensed plumber.

The following PUB-compliant upgrades were completed:

Installed a double-check valve to prevent backflow
Connected the drainpipe to the nearest floor trap to discharge water.
Applied proper electrical bonding to prevent electrocution risk
All fittings were reworked using corrosion-resistant stainless steel pipes

The replacement was completed with system testing and PUB documentation submission to confirm compliance.

Work Scope for Ariston Water Heater Corrosion Replacement

Removal & Site Prep

Shut off the water and power supply
Safely removed the corroded AN2 30 RS unit
Disconnected non-compliant fittings

Installation of New Heater

Mounted the new Ariston SL2 20 RS securely
Installed stainless steel inlet/outlet pipework
Fitted double check valve, drainpipe, and stop valve
Applied protective electrical bonding
Recommissioned the system and tested for leaks and safety

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 Ariston Water Heater Corrosion case at 409D Northshore Drive was safely and professionally resolved with a fully compliant installation of the Ariston SL2 20 RS. The new system now includes all necessary safety components—backflow prevention, controlled drainage, and electrical protection—ensuring long-term peace of mind for the homeowner.

Homeone ensures every installation meets strict PUB and EMA standards, even in tight HDB ceiling spaces.

Project Location: 409D Northshore Drive HDB