Reminder to install pressure limiting valves
The Victorian Building Authority (VBA) has seen an increase in complaints where the licensed plumber has failed to install a pressure limiting valve when it was required.
Licensed plumbers are reminded it is mandatory to install a pressure limiting valve when the maximum static pressure at a property exceeds 500 kPa, as detailed below:
- AS/NZS 3500.1:2021, clause 3.3.4 states that water at any outlet, other than a fire service outlet within a building shall not exceed a static pressure of 500 kPa.
Pressures above 500 kPa can result in:
- Failure of piping and appliances, leading to property damage.
- Excessive noise in the water supply system (water hammer).
- Excessive water usage.
- Voiding of appliance warranties and property insurance.
When non-compliance is identified by the VBA, the licensed plumber must return to site to ensure compliance is achieved.
Where damage at a property has occurred due of non-compliance, it may result in a claim on the responsible plumber’s insurance.
For more information and further guidance, please read Practice Note Cold Water Plumbing CW 03 | Maximum static water pressure within a building (PDF, 314.25 KB)
