The gas testing equipment is only used to find leaks in sub-surface pipelines mainly when a leak has been tested using the acoustic method. An inert and safe gas is injected and allowed to flow into the pipeline. The gas escapes through leaks then rises through the ground and into the atmosphere.
The gas is detected using a gas detector on the surface and indicates that there is a leak nearby.
Equipment & Methods
Find out more about our detection and inspection equipment and working methods:
- 1litre per minute water loss is roughly 40 000 litre per month.
- Towns generally lose 25% or more of water through leaking pipes.
- If you suspect a pool leak, place a bucket on the first step and fill to the same level as the pool. If the level of water in the pool drops below that of the bucket, then there is a leak.
- If you suspect a water leak, close all taps and place your ear against a water pipe. If a faint hissing sound is heard there could be a leak.
- Water leaks usually start off very slowly, so small that they show little or no movement on the water meter. The leaks develop into larger leaks and may burst when there are spikes in water pressure.
- The most common cause of water loss is poor pipeline installation and failure of fittings. Soil loading and excessively wet soil causes immense pressure on pipes and fittings. Pipes should be bedded in sand but this is usually not done. Angular rock fragments against pipes and poor connections are the main culprits.
- As the leaks slowly erode sub-surface soil the water finds its way through the ground following lines of weakness in sub-surface pathways. Some leaks even as large as 500 000 lt/day may never show on the surface. The orientation of the leak, ground conditions and rock fragments above the pipe are the main reasons why leaks never show on the surface.