Gas Hot Water Unit Replaced in North Melbourne
Completed Job Summary
A gas hot water service was completed in North Melbourne following a report of a Rheem Integrity 24 unit displaying error code C2 11. The existing unit was assessed, replaced with a Thermann 26L NG hot water system, and tested following commissioning.
26 May 2026
Byron Slabbert
Founder and Managing Director
81703
This job record is derived from first-party technician notes and the Simpro job management.
Customer report
The customer requested assistance for a Rheem Integrity 24 hot water unit located at a residential property in North Melbourne. The reported issue was an error code C2 11 displayed on the unit. The customer was new to Zebra Plumbing and requested an appointment to assess the hot water service. The service engagement focused on identifying the cause of the hot water system failure and determining the most appropriate resolution for the existing installation.
Diagnosis & Technical Assessment
The service commenced with inspection of the existing Rheem Integrity 24 hot water unit, following reports that the system was displaying error code C2 11. During assessment, the technician observed that the hot water unit was not firing up and appeared to be an older installation, estimated to be more than 17 years old.
The quoted scope included an assessment of the existing installation, with consideration of whether the gas valve required upgrading as part of any replacement works. Following inspection of the unit’s condition and operational status, the existing system was replaced.
The replacement scope included isolating the gas and water supplies, disconnecting the existing pipework, installing a new hot water unit, reconnecting the pipework, commissioning, and testing. Testing and commissioning activities were completed following installation to confirm the new system’s operation.
The completed assessment identified a non-operational hot water unit, leading to the replacement of the existing appliance with a new gas hot water system.
All work was completed in accordance with the Victorian Building Authority (VBA) regulatory framework.
Solutions delivered
The completed solution involved supplying and installing a Thermann 26L NG 50 Degree 12YW gas hot water unit. Gas and water services were isolated before the existing unit and associated connections were disconnected.
Following the removal of the existing installation, the new Thermann unit was positioned and connected to the property’s existing services. Pipework connections were completed before commissioning activities commenced. The installation scope included testing of the new system following completion of the connection works.
The replacement was selected after assessing the existing Rheem Integrity 24 unit, which was not firing and was identified as an older installation. The completed works restored the hot water service using a new gas hot water system configured for the property’s existing supply arrangement.
Tools, Parts & Systems Used
- Rheem Integrity 24
- Thermann 26L NG 50 Degree 12YW
- Gas hot water system
Outcome & Results
A new Thermann 26L NG 50 Degree 12YW gas hot water unit was installed and commissioned at the North Melbourne property. Testing was completed following installation, and job completion records confirmed clean-up and final checking of the completed works.
All work was carried out in accordance with relevant Australian Standards and safety requirements.
Repair vs Replacement
Gas hot water systems may be repaired or replaced depending on the condition of the appliance, operational status, and overall serviceability of the installation. Where a unit is no longer operating and has reached an advanced age, replacement may be selected to restore hot water service using a current production unit.
For this North Melbourne job, the existing Rheem Integrity 24 system was not firing up and was assessed as an older installation. A Thermann 26L NG 50 Degree unit was selected as a replacement, allowing the hot water service to be recommissioned following installation and testing.