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Whether you’re building a conservatory, extending your home or constructing an out-building, you will need to know the exact depth and location of all drains in the construction area.
Sonar technology and sonar surveys may seem from the realm of 007, but it’s the most reliable way to perform this drain mapping.
CCTV drain surveys are commonly conducted for drain mapping purposes, and these give us plenty of useful visual information – all except the precise location and depth of the pipe.
That’s where the power of sonar comes in, and this technology can be used in partnership with cameras to give a truly accurate, precise result.
But how does this technology work, and when is it useful?
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So what is sonar and how does it work? Sometimes called ‘sonding’, the process of sonar drain tracing works by putting a sonde (a self-contained sonar transmitter) onto a crawler device – this could be a flexible rod or a camera, for example. This sonde is then fed deep into the drain.
At each position that the engineer wants to take a reading from, the transmitter will send a sonar pulse outwards in a circular configuration. A trained technician will be waiting above ground with a receiver device to take the reading – they will be able to adjust and prepare the receiver to take accurate measurements depending on the sonar frequency emitted.
Measuring these pulses allows the experts to not only pinpoint the location of a drain or a drain issue, but also determine how deep down the drain is by measuring the distance between the sonde underground and receiver device above ground.
Discovering the precise location and depth of a drain with a sonde drainage survey is useful in a number of situations:
Express Drainage Solutions provided drainage solutions for 20,000+ residents & businesses of London and the surrounding areas in the past 12 months alone. Our wide range of services includes: drain unblocking, rodent control, drain mapping/surveying, drain installation & repair, septic tank/cesspit installation, repair & emptying, flood response & much more.
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