A CCTV drain inspection is a non-invasive way to see exactly what's happening inside your underground pipes. A licensed drainlayer feeds a waterproof camera on a flexible rod through your drains, sending live footage to a monitor above ground — no digging required. It's one of the most reliable diagnostic tools in modern drain maintenance.
How Does a CCTV Drain Inspection Work?
A small, waterproof camera head is attached to a flexible cable and pushed through an access point — usually a drain inspection chamber, a cleanout, or a toilet. As the camera travels through the pipe, it records high-definition footage and often logs the location of any issues using a built-in transmitter. The operator watches the live feed and can pinpoint exactly where a problem is, how severe it is, and what's causing it.
Most systems also record the footage so you receive a copy — useful if you're buying a property or making an insurance claim.
What Can a CCTV Inspection Find?
CCTV inspections are excellent at identifying:
- Tree root intrusion — roots from trees and shrubs are one of the most common causes of blocked or cracked drains in NZ, especially in older suburbs with mature plantings
- Pipe cracks, fractures, or collapses — caused by ground movement, age, or heavy vehicle loads
- Displaced or misaligned joints — common in older clay or concrete pipes that have shifted over time
- Grease and scale build-up — particularly in kitchen drain lines
- Foreign objects — items that have been flushed or washed down drains
- Bellied pipes — sections of pipe that have sagged and collect waste
- Corrosion — especially in older cast iron or galvanised pipes
When Would You Need a CCTV Drain Inspection?
There are several situations where a CCTV inspection is strongly recommended:
Buying or Selling a Property
A pre-purchase drain inspection is one of the smartest investments you can make before buying a home. Drain repairs can run into thousands of dollars, and problems are rarely visible from the surface. Ask your building inspector whether they include drains, and if not, arrange a separate CCTV inspection.
Recurring Blockages
If your drains block repeatedly despite clearing, there's likely an underlying structural issue — not just a build-up of debris. A camera will show you exactly why the problem keeps coming back.
Slow-Draining Fixtures
Sinks, showers, or toilets that drain slowly throughout the house (not just one fixture) can indicate a partial blockage or pipe damage further down the line.
After Tree Removal or Landscaping
Roots don't disappear immediately after a tree is removed. A CCTV check confirms whether roots have already penetrated your pipes.
Before Renovation or Extension Work
If you're adding a bathroom, extending your home, or doing significant landscaping, knowing the condition and layout of your existing drain network helps your tradesperson plan the work correctly and avoid costly surprises.
Unexplained Wet Patches or Odours
Persistent damp patches in your garden, unexplained lush grass growth, or sewage smells near your property can all point to a leaking drain underground.
What Happens After the Inspection?
Once the footage is reviewed, your drainlayer will explain what they found and recommend next steps. Depending on the issue, solutions might include:
- High-pressure water jetting to clear blockages and roots
- Pipe relining — a trenchless repair method where a resin liner is inserted and cured inside the existing pipe, avoiding excavation
- Spot repairs — targeted excavation to fix a specific crack or joint
- Full pipe replacement — for severely damaged or collapsed sections
In New Zealand, drain work that connects to the public wastewater or stormwater network is restricted work under the Plumbers, Gasfitters, and Drainlayers Act 2006. This means it must be carried out by — or under the supervision of — a licensed drainlayer. You can verify a tradesperson's licence at the Plumbers Gasfitters & Drainlayers Board.
Some drain repairs may also require a building consent depending on the scope of work. Always check with your local council before starting any significant drain repair or replacement. For general guidance on what requires consent, visit MBIE Building Performance.
What Does a CCTV Drain Inspection Cost?
As a rough guide, a basic residential CCTV inspection typically starts from a few hundred dollars, with pricing varying based on the length of pipe inspected, access difficulty, and your location in NZ. Urban areas generally have more competitive pricing. Always get at least two quotes.
When to Call a Professional
Any CCTV drain inspection should be carried out by a qualified drainlayer with proper equipment — consumer-grade drain cameras don't provide the resolution or reach needed for accurate diagnosis. If you're experiencing recurring blockages, slow drains, or you're about to purchase a property, don't delay. A professional inspection now can save you from a much larger bill later.
You can find qualified local drain cleaners and drainlayers on tradedirectory.co.nz.
Master Plumbers
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