Keeping Your Sewer Functional with Trenchless Repairs

It’s a dirty job, but someone’s got to do it. So if you’re unfortunate enough to have a burst or damaged sewage system, it’s essential that you choose a qualified professional who knows the quickest and most effective way to get everything back to working order in the least messy way possible.

The wonders of modern technology have made it possible to repair a sewer without large excavation work, making the whole process far less disruptive and expensive than it used to be. Eden Harper, Battersea estate agent explains how- “Trenchless technology allows plumbers to get to the root of the problem and fix any damage without having to dig up the surrounding area- a costly and inconvenient job which often resulted in roads being closed and extortionate bills.”

Here’s the lowdown on the different types of trenchless technology and how they work:

Pipe Bursting

Pipe bursting is best suited to pipes made of clay, asbestos cement, steel and concrete. Process involves inserting a cone shaped head directly into the existing pipe, causing it to expand and split and make way for a completely new pipe. This method is usually used on pipes of up to 450 feet in length.

Cured in place pipe lining

Also known as Epoxy Sewer Lining, this method involves the insertion of a resin soaked lining direct into the pipeline. Once in place its then cured using the heat created from steam, hot water or UV light. It’s often used in larger properties and commercial units, particularly those where there’s a heavy build up of food, oil or grease.


As the name suggests, pipe patching involves working on one specific area rather than installing a completely new pipe. As well as repairing damaged areas, this method also provides effective protection from leaks and cracks in the future. Patches are usually made from a resin based putty which is blown directly into the pipes, giving an effective barrier that’s particularly effective for hydronic systems and pipes that hold potable water.


A major sewage pipe repair is never going to be cheap, but as Assetgrove says, “This modern trenchless technology has made it less expensive overall, because there are no extensive excavation works that need to be carried out.” The costs vary greatly depending on the size of the project, type of pipes used in the current sewage system and the materials used. Pipe bursting is usually the cheapest method because it’s relatively quick, but you’re still likely to be looking at anything between £3,000 and £6,000 for a trenchless sewer repair on an average three bed property.

As with most major repair jobs, prevention is always better than be cure. If you have a good structural survey done before purchasing an older or unusual property that’s a good place to start, and always remember to treat your pipes with respect.

Best Gapp summarises, “Be careful what goes down the loo (wipes and sanitary towels are common pipe blockers) and fit a good sink trapper to avoid excess food and oils slipping into your pipes.”