Same-day drain clearing on the Lower North Shore.
Blocked sinks, toilets, showers and main sewer lines cleared in Mosman — with a camera down the line so you find out what caused it, not just that it moved.
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Mosman is 52.0% apartments and 34.9% separate houses across 13,399 dwellings, and the two sit side by side rather than in separate pockets. On one side of a street a Federation house with drainage still in the ground from the early 1900s; on the other a block of units with a shared stack. Roots at an old joint and fat in a modern stack are different problems with different fixes, and Mosman produces both in volume.
How people live in a suburb decides what blocks its drains. A split like this one is why no assumption holds across the suburb — the same fault means something different depending which type of property it is in.
Mosman sits in the Municipality of Mosman, postcode 2088. A peninsula between Sydney Harbour and Middle Harbour, with sandstone headlands at Bradleys Head, Georges Head and Middle Head, harbour beaches and steep coastal slopes.
Local figures sourced from: ABS 2021 Census QuickStats — Mosman · Mosman, 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.
The same symptom points at roots in one and grease in the other. Which building you are in is the first diagnostic.
Sandstone slopes mean the private run is often longer and harder to reach than the frontage suggests.
Federation-era pipe fails slowly at the joints, and that is what a season of worsening flow looks like.
Two entirely different findings depending on the building. Under the Federation houses, roots through a joint in pipe that has been in the ground since the early 1900s. In the units, fat and wipes in a stack. Across 13,399 dwellings split 34.9% houses to 52.0% apartments, both come up constantly.
Most repeat blockages are a pipe problem, not a blockage problem. We look before we quote.
Richard Harnett bought the original 108 acres in 1859 and opened a sandstone quarry at Mosman Bay in 1878; residential development followed through the Federation period. Drainage from that era is still in service under many house blocks, while the apartment stock spans everything from interwar to contemporary.
Which of these a job needs depends entirely on the property, which is why we look before quoting.
Shows what caused the blockage and whether the pipe is damaged. The step that stops you paying twice.
Scours the pipe wall back to full bore rather than punching a hole through a build-up.
A cutting head removes the root mass itself. It restores flow, but roots grow back through the same opening.
A new liner cured inside the old pipe, sealing the joints roots came through. No excavation, so nothing above the pipe comes up.
Nothing here is quoted from the address. A camera establishes which of the two problems it actually is, and the method follows — jetting for a stack, cutting and then relining where roots have come through an old joint. Steep sandstone between house and street is what makes excavation expensive, and what makes no-dig repair worth pricing.
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 Mosman property and we’ll tell you straight — including when the simple clear is the whole job.
Note which fixtures are affected and whether any neighbour has the same thing. In a suburb as mixed as Mosman that is what narrows down whether the fault is yours alone.
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 Mosman and the rest of the Lower North Shore. More on emergency plumbing.
Different advice for the two halves of the suburb: in a unit, control the fat; in a Federation house, find out what condition the original drainage is in before it tells you itself.
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.
Jetting, cutting or a machine, chosen by what the line is doing — not by what is quickest to bill.
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 Mosman:
Most often for one reason here: two plumbing worlds on the same street. Two entirely different findings depending on the building. Under the Federation houses, roots through a joint in pipe that has been in the ground since the early 1900s. In the units, fat and wipes in a stack. Across 13,399 dwellings split 34.9% houses to 52.0% apartments, both come up constantly. 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 Mosman 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, jetting $250–$600, root cutting $400–$1,200 and a CCTV inspection $250–$550. Those are market ranges rather than Voyager’s price list. Property type first, then terrain. Steep sandstone between house and street means a private run is often longer and harder to reach than the frontage suggests, and that is what makes excavation expensive enough to price a no-dig alternative against. 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 tells you whether this is maintenance or a repair being postponed. We would rather tell you it is fine than clear it twice.
Mosman is 52.0% apartments, so this comes up constantly. If the line serves more than one lot it is generally common property and the owners corporation’s to arrange; if it serves only your lot it is yours. We establish which before work is authorised and deal with the strata or building manager directly — the plumber page for Mosman covers the ownership rules in full.
Completely. Mosman is 34.9% separate houses and 52.0% apartments, and they fail differently — houses on roots into Federation-era joints, units on fat in a shared stack. The symptom can look the same from inside, but the cause, the method and who authorises the work all differ. It is why nothing here is quoted from the address alone.
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
