Sewer Line Repairs | Blocked & Broken Sewer Pipes | PIRB-Registered Plumbers

How Do You Know If Your Sewer Line Has a Problem?

Sewer line problems typically affect multiple drains simultaneously – a sign the fault is in the main line rather than an individual fixture. If more than one toilet, basin, or floor drain is backing up at the same time, the main sewer line is the likely cause. Other indicators include a persistent sewage smell inside the property or in the garden near the sewer route, gurgling sounds from drain fixtures when another fixture is used, water backing up into a ground-floor bath or shower when an upstairs toilet is flushed, and patches of unusually green or lush grass above the sewer line – a sign of sewage leaking into the surrounding soil. In severe cases, sewage backs up through the lowest fixture in the property. Any of these symptoms warrants professional assessment. For single-fixture blockages, our high-pressure drain jetting service is usually sufficient. For widespread or recurring drainage problems, or where the line has been physically damaged, this sewer line repair service is the appropriate response. Our 24/7 emergency team responds to sewage backups around the clock across Pretoria, Johannesburg, George, and Knysna.

What Are the Most Common Causes of Sewer Line Failure?

Root intrusion is the leading cause of sewer line blockage in South African residential properties. Tree roots grow toward sewer pipe joints, entering through even a hairline gap and expanding until the pipe is fully blocked or the joint is ruptured. Older clay and concrete pipes – common in properties built before 1985 – are particularly vulnerable. Ground movement and subsidence can cause pipe misalignment or collapse at joints, particularly in Gauteng’s expansive clay soils where seasonal moisture changes cause significant ground movement. Grease accumulation is addressed by our high-pressure jetting service as a first response, but when it has hardened over years into a solid obstruction, a structural repair is required. In new or recently renovated properties, incorrectly graded drainage – pipes without sufficient fall to carry waste –  causes recurring blockages that cannot be resolved by clearing alone. For leak detection in the surrounding soil caused by a cracked sewer pipe, our detection equipment can confirm the extent of ground contamination before excavation.

How Does K-Plumbing Repair a Damaged Sewer Line?

The repair method depends on the nature and location of the fault. For a blockage caused by roots, grease, or foreign objects, high-pressure water jetting clears the pipe fully. Where a pipe section is cracked, misaligned, or collapsed, the affected section must be excavated and replaced or relined. Excavation and replacement uses new HDPE or uPVC pipe and is the conventional approach for severe damage. Where excavation is disruptive or impractical – under a driveway, garden path, or building floor – pipe relining installs a new structural lining inside the existing pipe without excavation. All sewer line repairs are carried out by PIRB-registered plumbers to SANS standards and include a Certificate of Compliance. After the repair, we recommend a green plumbing assessment to identify whether greywater recycling can reduce the load on the sewer line going forward.

Frequently Asked Questions – Sewer Line Repairs

How do I know if the blockage is in my sewer line or the municipal sewer?

K-Plumbing can assess which side of the boundary the fault lies on. A blockage in your private sewer line is your responsibility to clear; a blockage in the municipal sewer is the municipality’s. We provide documentation to support a fault report to the municipality where relevant. Our emergency team can respond same-day to establish the source.

Can tree roots be removed from a sewer pipe without excavation?

Yes. High-pressure jetting with a root-cutting nozzle removes roots without excavation. However, roots will regrow through the same entry point. For a permanent solution, the affected section should be relined to seal the entry point. K-Plumbing advises on the right approach after assessing the extent of the root intrusion.

What is pipe relining and is it suitable for all sewer pipes?

Pipe relining inserts a resin-saturated liner into the existing damaged pipe, which cures to form a new jointless pipe from the inside – no excavation needed. Suitable for most uPVC, clay, and concrete pipes 100–300mm in diameter. Completely collapsed or severely misaligned pipes require excavation and replacement. Relining complements our drain jetting service – jetting clears the pipe, relining seals it permanently.

How long does a sewer line repair take?

Jetting clearance takes one to two hours. Excavation and pipe replacement for a standard residential repair is typically one day. Pipe relining takes four to eight hours including resin curing time. For emergency sewage backups, we respond 24/7. See our call-out fee schedule for pricing.

Is sewer line repair covered by home insurance?

Most policies cover sudden accidental damage to underground pipes but exclude gradual deterioration or root damage. K-Plumbing provides a detailed written report of the fault, its cause, and the repair method to support your claim. Our work is insurance-approved – the same standard applied across all our plumbing services. Check your policy wording before assuming cover applies.