The Types of Pipe Relining Explained
26 MAR 26
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The Types of Pipe Relining Explained

When your drainage pipes start causing trouble, the last thing you want is a crew digging up your alfresco area or tearing through landscaped gardens. That’s where Nuflow pipe relining comes in.

However, something that many Perth property owners don’t realise is that there isn’t just one type of pipe relining. Nuflow actually offers several different methods, each designed for specific pipe systems and drainage problems.

Nuflow Blueline (Pull-in-Place Lining)

Pull-in-place lining involves saturating a flexible liner with epoxy resin, then winching it through your existing pipe via access points like inspection openings or cleanouts. Once positioned, we inflate it with a bladder and leave it to cure for 2-4 hours.

Blueline handles pipes from 40-300 millimetres in diameter, making it perfect for residential sewer pipes, stormwater drains, and vertical stacks in multi-storey buildings. The method works brilliantly for runs up to 50 metres with multiple bends or junctions because the liner can navigate complex pipe networks without needing additional access points.

We typically use Blueline for:

  • Residential plumbing for sewer and stormwater systems beneath concrete slabs
  • Commercial developments where digging would disrupt business operations
  • Strata plumbing services in buildings with limited access
  • Drainage pipes running under established landscaping or pools

Nuflow Redline for Pressurised Pipes

Not all pipe problems involve drainage. If you’ve got corroded copper or galvanised steel pipes carrying potable water, Nuflow Redline offers a different solution. This is a spray coating method, not a structural liner.

The process involves blowing an epoxy coating through pressurised metal pipes using compressed air. The coating seals pin-hole leaks, stops corrosion, and restores water quality in pipes from 12 to 100 millimetres in diameter. It cures in about 2 hours and is approved for potable water systems. It’s a preventive measure for ageing metal pipe systems in older Perth homes, where replacing all the copper pipes behind walls and beneath floors would be expensive. The spray-in-place pipe lining approach means we can treat your entire water system without major demolition work.

Nuflow Greenline for High-Pressure Applications

Commercial and industrial properties often have pressurised water mains operating at much higher pressures than residential systems. Nuflow Greenline handles potable water and rising mains up to 1600 kilopascals, using a hybrid epoxy specifically approved for drinking water contact.

The technology follows the same basic principles as Blueline but uses materials rated for the extra stress of pressurised systems. It’s less common in residential plumbing services but essential for larger infrastructure projects.

This method suits:

  • Commercial developments with large-diameter water supply pipes
  • Industrial facilities with process water systems
  • Council reticulation mains feeding multiple properties
  • High-rise buildings with significant pressure requirements

 

Pipe Replacement vs Pipe Relining: When Excavation Is Needed

Pipe relining isn’t always the answer. If your pipes have severe collapses, crushing, or back-graded sections (bellies where water pools), relining won’t fix the underlying problem. Structural liners follow the existing pipe shape; they add strength but don’t correct negative fall or major deformation.

That’s why we always start with CCTV drain camera inspection. We need to locate pipes accurately and assess their condition before recommending a solution.

Sometimes, pipe location and excavation are still the most practical option, particularly if:

  • The pipe has collapsed completely
  • A significant belly or back grade is preventing proper drainage
  • The existing pipe material is incompatible with relining
  • Excavation costs are actually lower than relining for short, accessible sections

CCTV Drain Cameras & Electronic Locating to Locate Pipes

Before any pipe repair work begins, we need to know exactly what we’re dealing with. That means CCTV inspection to assess pipe condition and electronic locating to map the pipe route accurately.

Electronic locating helps us identify where pipes run beneath your property, how deep they sit, and where access points exist. This information is essential for choosing between relining methods or determining if excavation makes more sense for your situation.

The footage shows us:

  • Crack locations and severity
  • Tree root intrusion points
  • Pipe material and joint types
  • Sections with bellies or misalignment
  • Areas of active leaking or deterioration

How Pipe Relining Solutions Restore Strength and Longevity

One of the biggest advantages of Nuflow systems is longevity. The Blueline product carries a 50-year material warranty, and we back our workmanship with a 10-year guarantee. That’s not marketing talk, it’s a reflection of how the technology performs in real-world conditions.

The epoxy materials are inert once cured, meaning they won’t corrode, crack from ground movement, or deteriorate from tree root contact. For Perth’s sandy soils and Mediterranean climate, where underground pipes face constant pressure from shifting ground and aggressive root systems, durability matters.

The structural strength comes from the cured epoxy, creating a smooth, seamless interior surface. Unlike traditional pipes with joints every few metres, a relined pipe has no weak points for roots to penetrate or sections to separate. Water and waste flow more efficiently, and the risk of future blockages drops significantly.

Ready to Fix Your Underground Pipes with Tunnel Vision?

Choosing the right pipe relining method depends on your specific situation: the pipe type, location, condition, and what you need it to do. We’ve helped Perth property owners fix everything from residential sewer pipes beneath pool decks to commercial stormwater systems under car parks.

If you’re dealing with blocked drains, slow drainage, or suspect pipe damage, the first step is getting a proper inspection. Contact us or call 1800 631 799 to book a plumber for a CCTV assessment.

FAQ

Pipe relining cannot fix severely collapsed, crushed, or back-graded pipe sections. If your pipes have significant belly areas where water pools or sections that have completely collapsed, the liner will simply follow that defective shape rather than correcting it. In these situations, CCTV inspection and pipe location may show that excavation and realignment are actually more practical and cost-effective than attempting to reline.

No, structural liners follow the existing pipe shape. They add strength and seal cracks, but don’t correct sag or negative fall in the pipe. If your drainage system has belly sections where water sits instead of flowing properly, excavation and realignment are usually required to restore proper function.

The main alternatives include open-cut pipe replacement (digging up and replacing damaged sections), pipe bursting (breaking the old pipe whilst pulling through new pipe), slip-lining (inserting a smaller diameter pipe inside the existing one), or spot-repair patches for short defects. Each method has specific applications depending on pipe condition, location, and access. Traditional excavation and replacement remains the most common alternative when relining isn’t suitable for the job.

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