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8 Important Techniques For Carrying Out Drainage Investigations

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What Is a Drainage Investigation?

When you think fluid systems and fluid consumption, you cannot escape the topic of drainage and drainage investigations. Drainage investigation is a process of checking whether certain drainage systems operate properly. This involves regular checks of whether a system is prone to blockage or interruptions that may hinder drainage of water as it is supposed to. A drainage investigation could be the difference between you having a proper flow of water otherwise known as an efficient water flow system or a mediocre water flow system that might lead to blockages and expensive fluid wastage.

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Why Have Drainage Investigations?

Checking for Water Ingress

For those who might not be familiar with the term, Water ingress simply refers to the act or means of water entry or infiltration through a surface that is porous. A drainage investigation would come in handy when it comes to checking for any sign of water infiltration into sensitive areas. It is also useful when correcting the effect of water Ingression and sealing any porous spots. o Subsidence Investigation Subsidence refers to a shift in the position of a surface relative to datum such as a seal level. This shift mostly occurs downwards and may lead to a lot of damage and instability. Subsidence has been responsible for great damage such as the collapse of huge structures, as well as the disruption of major flow systems. A drainage investigation is appropriate here in order to diagnose the problem and seek corrective direction and cause of action. Now that we have looked at some of the reasons why one should carry out a drainage investigation, it is important to look at some of the best techniques that can be put to use when carrying out drainage investigations. A CCTV survey has been heralded as a foolproof way to carry out a drainage investigation by some commentators. A number of holes have been poked into this argument though with some experts stating that in some instances where a CCTV survey showed sound joint alignment and zero defects, the system was found to be broken and highly porous. This dispels the assertion that this method is completely foolproof. So what are some of the other drainage investigation techniques?

Drainage Investigation Techniques

Dye Testing

Dye testing is one of the most efficient and simplest methods of drainage investigations. This method works superbly when you are handling a case to do with water infiltration in sensitive areas such as subfloor areas and cellars. This method involves dye testing different parts of the system with several colors in order to identify and single out the problem area. You do not need to worry about the dye to be used in testing. It is totally safe, environmentally friendly and won’t stain the working area. These dyes usually come in powder and tablet form. o Drain Flush Testing Checking a system can be as simple as the flush of a toilet. It does not have to be rocket science or requiring of an expert to fix this. You can flash the toilet, pour water or run a tap down a gully and wait by the manhole. If the water does not come through, it might mean that the system is blocked and requiring of attention. o Analysis of Water When you are dealing with cases of water infiltration into cellars and subfloors you may want to take a sample of this water. A sample of this water will help you determine whether you have stormwater, potable water or foul water on your hands. This analysis can be conducted at any local laboratory and should not cost you more than 90 pounds.

Pressure Testing

Pressure testing can be done using either water or air. This is not only used during new build drainages but also during investigations. A water test can work by installing a bung at an end of a line and filing the upstream section with water in order to check for any leaks. Another test involves pumping or running air through one of the bungs in a system airline. The airline usually has a gauge connected to it with a small amount of water in it. As pressure builds in it water rises and remains in position if the system is intact and without any vulnerability. o Drain Camera Inspection A visual look at the inner workings of a system can give a lot of insight. This method is quite great when it comes to locating defects brought about by blockages such as misaligned pipes in order to correct them. o Pipe Profiling This is an advanced technique which involves using a ring of light on the drain’s internal wall and use of software to measure pipe deformations in order to ascertain the extent of damage. This method is increasingly gaining popularity since new materials are fast replacing traditional concrete pipes and clay which had the ability to easily show defects. o Sonar Drain Tracing This method involves the use of a transmitter which is pushed down a system with a receiver attached to it. This is great for locating exact spots where defects exist in camera surveys before the start of excavation works. o Ground Penetration Radar This involves the use of a unit that can be sunk down a drainage system in order to give readings on soil erosion and voids. Whatever method you choose, the importance of a drainage investigation should never be investigated.

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