Pipe Relining Methods Reviewed: CIPP, Pull-in-Place and Patch — Which Is Best?

Introduction

Not all relining is equal. There are three main techniques used in Melbourne, and the right one depends on the pipe, the damage and the access. Here’s an honest review of each — including where each one shines and where it falls short.

1. Cured-In-Place Pipe (CIPP) — the workhorse

### How it works

A resin-saturated felt liner is inverted or pulled into the host pipe, inflated against the wall, then cured with hot water, steam, or UV light to form a hard, structural pipe-within-a-pipe.

### Best for

Long, continuous runs (3m+), main sewer lines, recurring root intrusion, multi-junction systems.

### Pros

• Genuinely structural — rated equivalent to new PVC
• 50+ year design life
• Can navigate moderate bends
• Restores flow capacity (resin is smooth)

### Cons

• Higher minimum job cost (setup-heavy)
• Needs cure time before reuse

### Verdict

Our default choice for the majority of Melbourne residential and commercial sewer relines.

2. Pull-in-Place Liner — the precision option

### How it works

Similar resin-saturated liner, but pulled through the pipe between two access points and then inflated.

Best for

Sections with tricky access on one end, or where inversion isn’t practical.

Pros & cons

• Pro: Excellent control over liner placement

• Pro: Works well across short to mid-length sections

• Con: Needs two access points

• Con: Slightly more setup time

### 3. Patch Repair (Localised Liner) — the targeted fix

How it works

A short (300mm–1m) resin-soaked patch is positioned over a single defect using an inflatable packer, then cured in place.

Best for

Single cracks, isolated joint failures, small sections of root entry where the rest of the pipe is sound.

Pros & cons

• Pro: Cheapest option ($1,200–$2,500 typical)

• Pro: Fast — often under 2 hours on site

• Con: Only fixes the defect treated, not the pipe overall

• Con: Not suitable if multiple defects exist

Our honest recommendation

For most homes with ongoing blockages: CIPP. For tricky-access commercial sites: pull-in-place. For one-off small defects in otherwise healthy pipe: patch. We’ll never recommend a more expensive method than the job needs — the CCTV footage decides, not the quote.

FAQ

Which method has the longest warranty?

All three carry comparable workmanship warranties when installed correctly. We back all our relining work with 25 years.

Can you mix methods?

Yes — for example, a CIPP main with a patch on a separate branch. CCTV scoping reveals when this makes sense.

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Confused about which method you need? Book a CCTV inspection — we’ll show you the damage on screen and recommend the most appropriate (and cost-effective) reline.