NATA-Certified vacuum testing for sewer manholes and structures
Vacuum testing is a Sydney Water-certified method used to verify the compliance and integrity of maintenance holes and associated sewer structures under Section 73 requirements. This non-destructive process ensures that new installations and upgrades meet strict industry standards before approval.
By applying negative air pressure, vacuum testing quickly identifies any leaks caused by faulty seals, poor jointing, or construction defects. Detecting these issues early prevents costly failures, soil contamination, and unwanted infiltration into the sewer system.
Our NATA-certified team provides accurate, reliable testing with full documentation, giving developers, contractors, and asset owners confidence that infrastructure is watertight, compliant, and ready for handover.
The vacuum testing process is designed to provide a fast and reliable assessment of structural soundness and watertightness in sewer assets. All inlets are securely sealed, and a specialised vacuum plate is placed over the maintenance hole chamber. Negative pressure of approximately 37 kPa is then applied.
Once stabilised, technicians measure the time it takes for the pressure to drop from 33.8 kPa to 30.4 kPa. Results are compared against the requirements set out in WSA 02-2002-2.2 to confirm compliance.
All testing is carried out by NATA-certified operators in line with Sydney Water’s technical specifications, ensuring assets meet strict industry standards before approval and handover.
Why Vacuum Test?
- Identifies leaks in new or existing sewer structures
- Prevents soil contamination and excess system inflow
- Verifies integrity before final approvals or handovers
- Supports long-term performance and regulatory compliance
Test Method Overview
- Seal all structure inlets
- Install vacuum plate and apply ~37 kPa negative pressure
- Allow pressure to stabilise
- Time drop from 33.8 kPa to 30.4 kPa
- Compare results to standard WSA 02-2002-2.2
Key Benefits
- Meets Section 73 and Sydney Water requirements
- Provides NATA-certified assurance of structure quality [Click here to view our certification.]
- Performed by certified technicians using calibrated equipment
- Supports asset integrity with clear, documented reporting
