SEQ Water Supply Code - Part 2 (Construction)
Extracts from clause 19.4
“Conduct and report testing in accordance with Section 6 of AS/NZS 2566.2:2002 (Buried Flexible Pipelines – Installation) using the test method appropriate for the pipe material as nominated in the AS/NZS standard i.e. Clause 220.127.116.11 (method M4) for DI and PVC pipes and Clause 18.104.22.168 (method M5) for PE pipes.”
“The test pressure shall be minimum 1200 kPa applied as close as practicable to the lowest point of the main, including drinking and non-drinking water systems as per Australian standards.”
“Hydrostatic pressure testing of property services shall be undertaken at the same time and to the same parameters as the water mains.”
“If property services are required to be tested separate to mains testing, ensure the maintap at each connection is opened following the pressure test.”
19.4.4 Under pressure cut-in connections
“Test the connection assembly on the host pipe prior to drilling in accordance with this Clause and any other Water Agency requirements.
Before cutting-in to the host pipe, pressure test the assembly by applying a pressure that is 400 kPa above the operating pressure of the pipeline, but does not exceed 1600 kPa, for a period not less than 3 minutes.
Visually inspect the assembly for leaks.
Accept the pressure test on the assembly if there is:
(a) no visible leakage; and
(b) no failure of any pipe, off-take, valve, joint or any other assembly component.”
Extract from AS2566.2 – Appendix M
"Testing shall not take place against closed valves unless they are fully restrained and it is possible to check for leakage past the valve seat. Mechanical ends that are not end load resistant shall be temporarily strutted or anchored, to withstand the test pressures without movement."
Please refer to the Code for further details
Pressure testing results form part of the As-Constructed Package required to gain a Connection Certificate from Queensland Urban Utilities.
As per the SEQ Code, pressure testing is required for all water mains and property service connections.
We recognise that pressure testing may not be practical in the following scenarios:
• live work cut ins to existing water mains where damage to the existing network could occur
• small diameter property service connections (<=DN63PE) that are installed in isolation (i.e. without associated water main).
The RPEQ Engineer can assess practicality of pressure testing in these scenarios and certify the connection in the absence of pressure testing.
This decision should be assessed using engineering judgement, taking into consideration location of the works, site constraints, number of pipe joints, proposed fittings, existing and proposed arrangement, risks and associated consequence of pipe leaks or failure.
The extent of pressure testing should be determined during the design phase and incorporated on the RPEQ certified design drawings, including any temporary fittings necessary to facilitate the testing (e.g. temporary hydrants and drilled and tapped blank flanges).
If you choose to not perform pressure testing and this has been marked on the design, please tick “Not required” in Section B of the As-Constructed Package Certification Form. Note: An updated version of this form will be provided soon.
Queensland Urban Utilities reserves the right to impose pressure testing.