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Posts Tagged ‘CCTV Drain Survey’

Drain Testing Methods


Posted on: April 7th, 2014

There are various methods of drain testing available depending on the circumstances and the nature of the particular problem to resolve.

CCTV drain survey is the most commonly used method of drain testing and involves inspecting a drain with a camera and reporting any defects.

Drain Testing

Drain Testing commonly involves a CCTV survey

hydraulic water test is used when testing for water-tightness, this test involves stopping up the down-stream pipe in the manhole and filling the drain with water until it can be visually observed at the top end of the pipe.  If the water level goes down it means the drain is leaking.

Dye testing can be used in conjunction with hydraulic water testing which involves adding a colour dye to the water, if the pipe is leaking into a basement area this type of test can highlight the drainage which is causing the problem.

Air testing is used when testing a pipe for air tightness and this involves stopping up both ends of the pipe and then putting the pipe under air pressure using a testing device.  If the pressure drops then the pipe has failed the test.

Drain testing specialists Scanseal

Drain testing specialists Scanseal

 



Why is a CCTV Drain Survey needed?


Posted on: December 16th, 2013

Drains, by their very nature of being underground, are subjected to a number of stresses over the years.  The ground can move dramatically, depending on how wet or dry it is, shrub or tree roots grow around the pipes and subsidence can also add high additional weight over the pipes. In order to check drains and pipes periodically a CCTV Drain Survey can be carried out.

 

CCTV Survey image showing damage to pipe

CCTV Survey image showing damage to pipe

Traditional Salt Glazed sewer pipes will start to breakdown after a while and these stresses can start to cause leaking at the joints, cracking along the pipes or at worst complete collapse. Leaky soil pipes are not only a potential health hazard but can also wash away the foundations of a property causing subsidence. Damaged pipes can cause blockages.

 

CCTV Drain Camera locates problem

CCTV Drain Camera locates problem

When buying a property, the mortgage lender will often want assurance that the pipes are in good order. How can this be done, without having to expose the pipes? A Close Circuit Television (CCTV) drain survey is ideal for this purpose. This is a totally non-invasive process in which we insert a ‘rod’ with a camera attached at one end, connected to a monitor and recording system at the other end. If a problem is detected, an on-screen meter counter can determine the exact position.

 

If a drain repair or patch to the pipe is necessary, there are a number of options available, including replacing the broken section by excavation, or alternatively and in most cases preferable by no-dig or trenchless technology which involves relining the drain or pipe from within with a Glass reinforced plastic. This is particularly useful where pipes are inaccessible, such as under buildings. 

Pipe Repair is carried out after CCTV Drain Survey

Pipe Repair is carried out after CCTV Drain Survey

 

 

 

 

After a drain repair has been carried out a further CCTV drain survey will need to be carried out check to make sure that water is free flowing without any restrictions.

 

 

 

 

 

 

 

 

CCTV Camera used to check pipe repair

CCTV Camera used to check pipe repair

 

 

 

 



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