The Permanent Fix for Central Coast Sewer Line Problems
If you’ve had a blocked sewer drain jetted clear and the blockage came back within a year or two, the problem isn’t the blockage — it’s the pipe. Jetting clears the obstruction. It doesn’t repair the crack, the open joint, or the root entry point that caused it.
CIPP sewer pipe relining is the structural repair. We install a cured-in-place epoxy liner inside your existing sewer pipe — from cleanout to house, without cutting up your driveway, path or lawn. The liner creates a new pipe inside the old one: joint-free, root-resistant, and structurally independent.
For a 1970s Central Coast home with terracotta sewer pipes that are now 50 years old, this is not an optional maintenance item — it’s the difference between managing a deteriorating system and permanently resolving it.
How CIPP Sewer Relining Works
1. CCTV Diagnostic Inspection
Before any relining work starts, we run a high-resolution drain camera through your sewer line. This shows us:
- The exact location and severity of every defect (root intrusion, cracks, joint displacement, collapsed sections)
- The pipe material (terracotta, early PVC, cast iron, concrete)
- The pipe diameter and layout
- Access points for liner installation
- Whether any sections require point repair, full relining, or (in rare cases) excavation
You receive a written inspection report with footage. You understand exactly what the problem is before we recommend any work.
2. High-Pressure Water Jetting
We clear the pipe of roots, grease, debris and any sediment accumulation. The pipe wall needs to be clean for the liner resin to bond properly. Jetting is done at 3,000–4,000 PSI for root masses and grease accumulation, with the appropriate nozzle for the pipe size.
3. Liner Preparation
The CIPP liner is a felt or fibreglass sock, sized to the exact internal diameter of the host pipe. In our workshop or on-site, the liner is saturated with a two-part epoxy or polyester resin. The liner is then ready for installation.
4. Liner Installation
The resin-saturated liner is either:
- Inverted — turned inside-out as it is pushed or winched into the pipe (inversion method), so the resin face ends up on the outside, pressing against the host pipe wall
- Pulled in — pulled through the pipe on a guide wire (pull-in-place method), then inflated with an airbag to press against the host pipe wall
For most residential sewer lines on the Central Coast (100mm diameter, 8–18m length), the inversion method is standard.
5. Cure
The liner is held in place against the host pipe while the resin cures. Cure methods include:
- UV light cure — fast (30–90 minutes), consistent, preferred for most residential work
- Steam cure — used for certain liner types and access situations
- Ambient cure — slower (several hours), used where other methods are not suitable
After cure, the liner is a rigid, monolithic structural pipe bonded to the interior of the host pipe.
6. Robotic Junction Reinstatement
If your sewer line has lateral connections (laundry, kitchen, second bathroom joining the main line), these are closed by the liner during installation. A remote-controlled robotic cutter enters the pipe post-cure and cuts the laterals open from inside. No external digging is required.
7. Post-Cure CCTV Inspection
We run the camera again after cure to confirm:
- Full liner adhesion along the entire run
- No bridging (areas where the liner hasn’t fully pressed to the pipe wall)
- All junctions correctly reinstated
- Smooth, clear bore confirmed
You receive post-cure CCTV footage as part of the job record.
What Sewer Pipe Relining Fixes
| Defect Type | CIPP Solution |
|---|---|
| Root intrusion (minor to severe) | Full reline eliminates all entry points |
| Cracked pipe wall | Liner bridges and seals crack, restores structural integrity |
| Open or displaced joints (minor) | Liner spans joint, creates continuous pipe |
| Pipe sagging / low gradient | Liner does not correct gradient — separate issue if causing drain problems |
| Corroded cast-iron bore | Liner creates smooth new bore, eliminates corrosion site |
| Partial collapse | Liner can often span — depends on severity |
| Full collapse | Requires excavation to access and relay |
| Extreme joint offset (30mm+) | Usually requires excavation to realign before lining |
Sewer Relining for 1970s Central Coast Homes
The typical Central Coast sewer relining job involves a 1970s brick home with:
- 100mm diameter terracotta sewer pipe
- 10–15 metre run from bathroom stack to the boundary cleanout
- Root intrusion at 2–4 joint locations
- One or more cracked sections
- Access via boundary cleanout and bathroom floor waste
This job takes approximately 7–8 hours from CCTV start to post-cure inspection completion. The driveway, concrete path, lawn, and garden are untouched.
Typical cost for this job: $5,500–$8,500 depending on pipe length and access complexity.
Compared to dig-and-replace for the same pipe run (breaking up driveway, excavating 12+ metres, replacing pipe, concrete reinstatement): $15,000–$25,000.
Sewer Pipe Relining Costs
| Job Component | Cost |
|---|---|
| CCTV inspection (credited on same-day reline) | $250–$500 |
| Setup / minimum charge (incl. first metre) | $2,500–$3,000 |
| Per metre relining (sewer, residential) | $500–$1,000/m |
| Full residential sewer reline (10–15m) | $6,000–$12,000 |
| Robotic junction reinstatement (per junction) | Included in job scope |
Sewer Pipe Relining FAQs
Q: How long does a relined sewer pipe last? The CIPP liner carries a 50-year product warranty from the manufacturer. The liner material is chemically inert, biologically resistant, and has no joints for roots to exploit. Full lifespan guide →
Q: Can you reline a pipe that’s been blocked before? Yes — this is the most common scenario. We clear the blockage first with water jetting, then reline the pipe so the blockage cannot recur.
Q: What pipe materials can be relined? Terracotta clay, early PVC, cast iron, asbestos cement, concrete and most other residential sewer pipe materials. Full guide to relinable pipes →
Q: Will my landscaping be damaged? No surface damage. The liner is installed through existing access points — cleanouts, floor wastes, small inspection openings. In some configurations we may make a single small access hole (approximately 300mm), but this is the exception and the hole is reinstated. No trenching, no driveway removal, no lawn disruption.
Q: Does sewer pipe relining require council approval? Not for works on your private sewer pipe within your property boundary. Full approval guide →