Same-day drain clearing on the Lower North Shore.
Blocked sinks, toilets and main sewer lines cleared in Northwood — with a camera down the line afterwards, because a root that got in once will get in again.
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Northwood is 92.7% separate houses across 289 dwellings, in a setting the name describes literally — mature trees close to private drainage on most blocks, between Woodford Bay and Gore Creek. Root intrusion into an aged private line is the standard call here, and with almost no apartment stock there is nothing shared to fall back on. The whole run from the house to the connection belongs to the owner.
How people live in a suburb decides what blocks its drains. A high proportion of separate houses means most of the drainage here is private line running under gardens, which is exactly where roots find it.
Northwood sits in the Municipality of Lane Cove, postcode 2066. On the northern side of the Lane Cove River between Woodford Bay and Gore Creek, about 8 km north-west of the CBD.
Local figures sourced from: ABS 2021 Census QuickStats — Northwood (NSW) · Northwood, New South Wales — Wikipedia
A drain rarely stops working without warning. These are the patterns worth acting on here — each one points at a different cause, which is what decides the fix.
Under woodland canopy this is the usual finding, and it means the pipe has an opening.
Water travels down a slope, so where it appears says little about where the fault is.
Roots grow seasonally. A drain that goes at the same time each year has a live root mass, not a blockage.
Root material in the debris, from mature woodland sitting close to private drainage on most blocks. On sloping riverside sites the symptom usually appears well below the actual fault, which is why the reported location is a starting point rather than an answer.
Most repeat blockages are a pipe problem, not a blockage problem. We look before we quote.
Northwood House was designed by Edmund Blacket and built in 1878, and the suburb developed around that era and after. Older properties therefore drain through jointed earthenware of considerable age, with newer sections wherever a house has been rebuilt or extended.
Roots have to come out before anything else can be assessed, and what happens after that depends on the state of the joint they came through.
The first move here. A cutting head removes the root mass and flow returns the same visit — but roots regrow through the same opening, so on its own it is a treatment, not a cure.
Shows the joint the roots came through and whether the pipe around it is sound. That is what decides between an annual clear and a repair.
A new liner cured inside the old pipe seals the joints the roots came through, removing the entry point without excavation.
Used here to flush out debris once the root mass is cut, and to show the joint clearly enough for the camera to assess it.
Cutting restores flow the same visit, but on a woodland block the roots come back through the same opening — so the camera afterwards is what decides between an annual clear and a one-off repair. Relining seals the joint without excavating a mature garden, which on blocks like these is usually the cheaper answer over any real timeframe.
Nobody likes ringing for a price and being told “it depends”. These are typical ranges across the Sydney market — not Voyager’s price list, but a realistic yardstick to judge any quote against, including ours.
| Clearing a simple blockage | $150 – $400 |
| Clearing a blocked main sewer line | $300 – $600 |
| High-pressure jetting | $250 – $600 |
| Cutting tree roots from a line | $400 – $1,200 |
| CCTV drain inspection | $250 – $550 |
| Pipe relining, per lineal metre | $450 – $800 |
| Pipe relining, typical whole job | $4,000 – $10,000 |
| Excavate and replace, per metre | $300 – $600 |
Voyager prices by the job, not by the hour, so the number you approve is the number you pay.
Describe what’s happening at your Northwood property and we’ll tell you straight — including when the simple clear is the whole job.
If this line has blocked before, say so when you call. In Northwood a repeat is the signal that something is growing in the pipe rather than stuck in it, and that changes what needs to happen on the visit.
Stop using the fixtures on that line. Every flush and every sinkful adds to what has nowhere to go, and on a main sewer blockage that is what turns a contained problem into an overflow.
Do not pour drain chemicals down it. They rarely clear a real blockage, they make the line unsafe to inspect or work on, and caustic product sitting against an old earthenware joint does the pipe no favours.
If sewage is surfacing, treat it as urgent. That is a health issue, not an inconvenience — keep people and pets away from it and call.
If it is out of hours and getting worse, ring rather than book — Voyager runs a 24/7 line for Northwood and the rest of the Lower North Shore. More on emergency plumbing.
Roots will keep returning through an opening that stays open, so the decision worth making is whether to keep clearing or to seal the joint. On a woodland block that maths usually favours sealing it sooner than owners expect.
Storm season finds every drain that was never quite right. Better to know before it rains.
Which fixture, how long, and whether anything is overflowing. That is usually enough to tell how urgent it is.
A cutter or jetter takes the mass out and restores flow, usually the same visit.
A camera down the cleared line shows whether this was a one-off or a pipe that will do it again.
Including when the answer is that nothing further is needed. A cleared drain with no fault is a perfectly good outcome.
A blocked drain is sometimes the symptom rather than the problem. These cover what comes next:
Voyager covers the whole Lower North Shore. These are the closest to Northwood:
Most often for one reason here: woodland roots into a private line. Root material in the debris, from mature woodland sitting close to private drainage on most blocks. On sloping riverside sites the symptom usually appears well below the actual fault, which is why the reported location is a starting point rather than an answer. A drain that clears easily and blocks again within months is telling you the cause is still in the pipe — which is why we put a camera down a cleared line rather than leaving it at ‘it’s moving again’.
Voyager runs a 24/7 line for Northwood and the rest of the Lower North Shore. If sewage is surfacing or a main line has stopped, say so when you call — that is what decides how fast someone needs to be there rather than the booking order.
Across the Sydney market a simple blockage typically runs $150–$400, while cutting tree roots from a line runs $400–$1,200. Root jobs sit at the higher end because clearing the mass is only half of it — the joint it came through is the other half. Those are market ranges rather than Voyager’s price list. Reinstatement across a mature garden, and run length on a sloping block. With 92.7% separate houses and only 289 dwellings, there is essentially no shared infrastructure to spread a cost across. We price by the job, not the hour, and you approve the number before anything starts.
Rarely, and it can make things worse. Caustic product does not shift a root mass or a collapsed section, it sits in the line where it is a hazard to work on, and against an aged earthenware joint it does the pipe no favours. If a chemical has already gone down, tell us before anyone opens the line.
If it is a genuine one-off — something went down that shouldn’t have — clearing it is the whole job. If the same line has blocked before, a camera is what tells you whether you are looking at an annual clear or a pipe that needs repairing. We would rather tell you it is fine than clear it twice.
Cutting the roots restores flow but leaves the opening they came through, so they return — usually within a year or two. Relining seals the joints from inside, which removes the entry point without digging up whatever sits above the pipe. Roots will keep returning through an opening that stays open, so the decision worth making is whether to keep clearing or to seal the joint. On a woodland block that maths usually favours sealing it sooner than owners expect.
It is common in Northwood, but it is not inevitable. An annual clear means roots are re-entering through the same opening every season. Sealing that joint — usually by relining rather than digging up a mature garden — ends the cycle. Over a few years it generally costs less than the repeat visits.
Yes, and telling them apart matters — they present similarly from the surface and are fixed completely differently. A drain that only misbehaves in heavy rain is usually stormwater or ingress rather than a blockage. A camera settles it in one visit.
Free quote, a fixed price agreed before the work starts, and someone on the end of the phone at any hour.
Voyager Plumbing · NSW Contractor Licence 476657C
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Page reviewed and updated 20 August 2026
