What Does “No Dig Technology” for Drain Repairs Mean?


If you’ve never had to repair a blocked drain, you might not fully appreciate what a nuisance it can be.

As well as causing bad smells, odours and overflowing pipes, there’s also the hassle and expense of getting the repairs done.

Here’s a quick overview of how no dig technology works and why it’s so important.

Conventional Solutions

When there’s a problem with a drain, it can cause real difficulties simply because of the location; being situated underground makes it hard to carry out an assessment of what’s gone wrong.

In the past, the only option would have been to dig up the ground before even starting the work to identify where the fault was. Alternatively, a number of different solutions could be tried – such as chemical flushes – but there would be no guarantee of success and also no certainty that the problem had been completely resolved.

Digging up the area instantly adds a lot more expense to the work, taking up more time and becoming a much bigger job than you may have anticipated. There’s also the inconvenience too, having a large excavation on your property means using cumbersome machinery which can be a lot of hassle, and leaves your garden in a mess!


The Solution

No dig technology allows the professionals to see underground without having to resort to ripping up the ground to gain access. This means the problem can be instantly identified allowing the correct solution to be offered, without wasting time or money.

This view underground is carried out using CCTV technology, which provides instant pictures back to the drainage worker. The camera is very small so can fit easily into the pipes and travel a long way underground to discover the very root of any problems. In many cases it may be a simple blockage such as fat, grease or hair or there may be tree roots growing within the drain.

Some blockages can be treated with drain jetting; this is a specialised form of water spray that experts use. Far more powerful than a hose, it can blast away debris and clear a drain.

In other cases, the drain may be cracked or broken. In the past, digging it up and replacing it would have been the only option but no dig technology can now offer a different solution.

A tough, epoxy-strengthened lining is inserted into the broken area which is then pushed into position with an inflation hose. This is then left to harden before the hose is removed, leaving the new lining to form a watertight seal and creating an “inner pipe”. This method usually results in approximately 6mm loss to the circumference of the pipe which shouldn’t affect the performance of the drain in any way.