Our Services
We are NATA & Sydney Water accredited to perform all of the below services to the appropriate WSA standards and Technical Specification as required by Sydney Water. We also offer CCTV of Stormwater lines for council approval, please let us know of any specific requirements when requesting a quote. If a different testing method or different standards are requested this will have to be agreed to at the time of quoting before the work is performed.
CCTV of Pipelines
A CCTV test is a remote inspection that visually examines and records the interior of a sewer or stormwater pipe network to identify any defects. The CCTV is done using a tractor mounted camera attached via cable to a 4WD. The camera can pan, rotate, zoom inside the pipe along with powerful LED lights for clear video.
Vacuum & Air Testing of Pipelines
Pipeline vacuum or air testing is a procedure used to verify that a pipeline is leak-free, ensuring there are no issues with damaged seals, joints, or holes in the pipe. All open ends will be plugged off, then depending of test type air is either pumped in (Air) or out (Vacuum). The time it takes for pressure to drop is then measured
Vacuum Testing of Structures
Much like pipeline testing structure vacuum testing is used to demonstrate that there are no leaks in the structure due to damaged seals, joints or holes. All inlets are plugged off then a specially designed plate is placed on top of the structure and a vacuum test is performed measuring the time taken for pressure to drop.
Deflection Testing
Deflection testing involves using a device called a prover which determines whether the pipe has been squashed due to concrete or any backfill poored on after it has been layed. A prover is a metal object slightly smaller than the pipe which is pulled through the pipe to confirm it is perfectly round and not squashed at any point in the section.
Hydrostatic Testing (Watermain, Pressure Main & Pressure Sewer)
Hydrostatic pressure testing is a process used to confirm that there is no leaks throughout the section being tested. The lines are tested to well above mains pressure to confirm it can withstand normal use. The watermain is filled with water and then topped up with high pressure water until testing pressure is reached. The main must hold pressure for the required time.
Compaction Testing
Compaction testing involves testing the earthworks materials at various depths both on top of pipelines and around structures to confirm that the material has been compacted to the required specifications. A pin is hammered into the ground which is then tested using a nuclear densomiter. That combined with a sample of the material which is tested in the lab provided the result.
DCP Testing
Dynamic Cone Penetrometer (DCP) testing is a geotechnical method that measures the strength of soil by driving a cone into the ground. The amount the cone has gone into the ground is measured after each blow. The amount of drop per blow indicates the soil’s density and properties at that depth. This is done under Manholes to determine the bearing capacity of the soil.
Level 1 Supervision for Pipeline Backfill
Level 1 Supervision involves one of our field technicians being present for the entirity of the backfilling above pipelines. This type of supervision is a requirement for some jobs in the Sydney Water Technical Specification. The technician will perform compaction tests as explained above on each layer from bottom to top as they are properly compacted.
Compaction Testing
Compaction testing involves testing the earthworks materials at various depths both on top of pipelines and around structures to confirm that the material has been compacted to the required specifications. A pin is hammered into the ground which is then tested using a nuclear densomiter. That combined with a sample of the material which is tested in the lab provided the result.