Q-FLEX TECHNICAL DATA
Pressure Testing & Purging of Drinking Water Pipes Pressure Test & Flushing
Systems should be visually inspected to ensure that all Joints have been pushed to the stopper on the fitting. Testing to be completed 30 minutes after the last expanded ring fitting. Flushing of the system should occur prior to and after pressure testing. Installers must comply with AS/NZS 3500 requirements. With initial pressurisation care must be taken to avoid air pockets. This usually entails releasing air from the furthest point of the system when first pressurised. All pressure testing must be conducted in accordance with the AS/NZS 3500. The successful execution and documentation of a pressure test that complies with AS/NZS 3500 and these guidelines is a prerequisite for any warranty claims from Drillcut. WATER PRESSURE TESTING Water services shall not show any leakage when subjected to a hydrostatic pressure of 1500 kPa for a period of not less than 30 min. The test shall be performed on installed piping prior to burial or concealment. It should be noted that when a pressure test is carried out, it may be necessary to disconnect and cap the water service to isolate it from the water main, fixtures and appliances, which may be damaged by the test pressure applied. Further, fire services are subject to individual testing by some network utility operator at a higher pressure and for varied periods of time. Please refer to AS3500 for further details. WATER PRESSURE TESTING 1. Build up pressure to 1250 KPa in the Veltanium Plus piping system. 2. After 10 minutes read and write down the test pressure. 3. Perform visual inspection for leaks on the entire water service installation, especially on the connections. 4. After an additional test period of 20 minutes, read and write down the test pressure.
If the pressure remains stable (+/- 5%) the system is deemed sound. If the test pressure has fallen by more than 5% then:
1. Repeat a thorough visual inspection of the piping and connections. 2. After resolving the cause of the drop in pressure, repeat the test.
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Technical Guide
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