Man investigating blocked drain

Accurate Positioning, Tracing & Locating of Drains & Groundworks

Call Us: 0330 133 1101

Need to know the exact location and depth of a drain? Get in touch, we can help.

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Specialist Drain Inspection, Depth and Location Services

Our Service

Using specialist Sonde equipment, we are able to carry out our drainage and ducting inspections and surveys with the utmost precision. This addition to a camera survey allows us to find the precise depths of drains up to 9 metres underground, and facilitates the accurate tracing of drains and ducting, allowing us to mark their exact locations on the surface, which is especially helpful when planning construction works. The Sonde equipment also permits us to mark precisely where problems are found in the drains, which helps the efficiency of any repair work that is needed.



Often, drain surveys are required to diagnose problems within the drains, or as a means to ascertain where drainage runs lay on the property. The Sonde service is relevant to enhance the accuracy CCTV camera surveys, which is why these are quoted on an individual basis. Prices for our Sonde service start from £150 and can provide you with the information you need. You can contact us via telephone, email, online chat or even submit a request us to call you back.

Man jetting blocked drain using high pressure jetting

Where and How We Operate

Our Range of Techniques 

The Sonde is specialist piece of equipment that transmits high frequencies, facilitating the accurate tracing of drains, sewers, and ducting, as well as the accurate pinpointing of where any damage within the drains is in relation to the surface. As an attachment to our CCTV camera equipment, it is the perfect addition to a CCTV inspection if more precise details are required, such as the depths of particular drains, where they correspond to on the surface, or where digging is required for drain repair work.

Mapping Drains

As an extra service, we provide drain tracing and mapping for drains on residential and commercial properties. Additionally to our CCTV camera equipment, we attach a Sonde device to the end of the camera, which allows us to accurately trace drains on a site and mark them up on the property, aiding in construction works or building planning as it gives precise measurements of drains, depths and locations. This accuracy can help you make informed decisions regarding any groundworks. 

Why Should You Use Mersey Rod?

We arrive as quickly as possible and operate an emergency drain team 24/7/365. We can be at your property the same day. We will make sure your drainage issues are sorted as soon as possible.

We are a trusted drainage company who  have 25+ years of experience, we have exceptional reviews of our services and are fully trained and qualified to carry out any of your drainage work.

All our engineers are trained and qualified, holding Water Jetting Association certificates. Our staff are also enhanced CRB checked to give you peace of mind. We pride ourselves on being as open, honest and helpful as possible.


Our services are cheap, reliable and efficient. All our services are fixed price and comes with at minimum a 6 month warranty for unblocks and a 12 month warranty on repairs. We do not charge if we can not rectify your drainage issues.

Mersey Rod Limited

Company Registration No: 11652758

VAT No: 308552702

Goodlass House, Goodlass Road, L24 9HJ

© 2020 by Mersey Rod

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