Blocked Sewer Drains Melbourne

Blocked Sewer Specialists Not Just Any Plumber

A blocked sewer is different from a single blocked drain. When the main sewer line backs up it affects the whole house — and clearing it properly takes the right equipment, not a hand-held drain snake. Water Serpent Plumbing is a dedicated drain and sewer specialist: every job runs on a truck-mounted 5000 PSI hydro jetter and a CCTV drain camera, so we cut through tree roots, clear the line completely, then show you exactly what caused it.

Jack attends every job personally — 20+ years' experience, 5.0★ from 85+ Google reviews, honest upfront pricing, and same-day service across the eastern suburbs and the Yarra Valley.

Reviewed and updated July 2026.

🚦 Drain, Sewer or Stormwater — Which One Is Blocked?

Signs You Have a Blocked Sewer (Not Just a Blocked Drain)

• Multiple fixtures affected at once: toilet, shower and sink all draining slowly or backing up together — the blockage is in the main line, not one pipe.
• Gurgling and rising water: the toilet gurgles or the water level moves when you run the sink or washing machine.
• Sewage smell or overflow: a foul smell inside or near the outside gully trap, or sewage pooling at the lowest drain or in the yard.
• Sewage backing up: waste coming back up the lowest fixture (often a ground-floor shower or floor waste) when you flush.

What Causes a Blocked Sewer in Melbourne

• Tree roots — the #1 cause: established gums and large trees across the Dandenong Ranges and Yarra Valley send roots into older sewer joints chasing moisture, then choke the line.
• Old clay / earthenware pipes: common in established homes; they crack and offset with age, letting roots in and waste out.
• Collapsed or misaligned pipe: ground movement and tree pressure can crush or shift a section of sewer.
• Fat, grease and flushed wipes: build up over time and snag on any rough joint or root.
• Foreign objects: anything that shouldn't be flushed eventually lodges in the main.

How We Clear & Repair a Blocked Sewer

1. CCTV diagnosis: we send a drain camera down the line to find the exact cause and location — no guessing, no unnecessary digging.
2. 5000 PSI hydro jetting: high-pressure jet blasting cuts through roots and scours the pipe walls clean — far more thorough than a drain snake.
3. No-dig repair if needed: if the camera shows a cracked or root-damaged sewer, we reline the pipe from the inside — a permanent fix without excavating the yard.
4. Final camera check: we run the camera through again to confirm the line is clear end-to-end.

No-Dig Sewer Repair (Pipe Relining)

If your sewer keeps blocking, the pipe itself is usually the problem — cracked, offset or root-infested. Digging it up means tearing through lawns, paths and driveways. Instead we use trenchless pipe relining: a new structural liner is cured inside the old pipe, sealing out roots and restoring full flow — typically in a day, with no excavation. It's the long-term answer to a sewer that blocks again and again.

Watch a Real Blocked Sewer Cleared

Raw footage from a real Water Serpent job — no staging, no surprises. This is exactly the kind of problem we clear every day across Melbourne's east.

▶ Watch on YouTube · more real jobs on our channel @waterserpentdrains

How Much Does It Cost to Clear a Blocked Sewer?

The honest answer: it depends on the cause and access, which is exactly why we run the camera first. Clearing a root blockage with the hydro jetter is a straightforward same-day job; relining a collapsed section is a larger one. Either way you get a fixed, upfront price before any work starts — no call-centre quotes, no surprises on the invoice. For a full breakdown of what affects pricing, see our blocked drain cost guide.

Who's Responsible — You or the Water Authority?

As a rule of thumb, the property owner is responsible for the sewer pipes within the property boundary (the house drain and the connection up to the boundary), while the water authority looks after the main sewer in the street. Most blockages we attend — tree roots, cracked house drains, gully-trap overflows — sit on the property side, which is why they fall to the owner. If a camera shows the issue is past the boundary, we'll tell you and point you to the right authority. Either way, the CCTV footage gives you proof of exactly where the problem is.

Service Area Across Melbourne's Eastern Suburbs & the Ranges

We clear blocked sewers across Ringwood, Croydon, Lilydale, Mooroolbark, Mount Evelyn, Monbulk, Belgrave, Ferntree Gully, Bayswater, Boronia, Kilsyth, Chirnside Park, Healesville and the wider Yarra Valley and Dandenong Ranges. In Ringwood? See our Ringwood blocked drain page. Not sure if it's the sewer or just one drain? Start with blocked drains or a blocked toilet.

Frequently Asked Questions

What's the difference between a blocked sewer and a blocked drain?

A blocked drain is usually one fixture — a single slow sink or shower. A blocked sewer is the main line that carries waste from the whole house, so it affects multiple fixtures at once and can cause sewage to back up or overflow. A blocked sewer needs camera diagnosis and high-pressure jetting, not just a plunger or snake.

What are the signs of a blocked sewer?

Several fixtures draining slowly or backing up together, a gurgling toilet when you run water elsewhere, a sewage smell inside or around the outside gully trap, or waste pooling at the lowest drain or in the yard. Any of these means the main line is blocked — call a sewer specialist promptly.

Can you clear a blocked sewer without digging up my yard?

Yes. We clear the line with a 5000 PSI hydro jetter through an existing access point, and if the pipe is cracked or root-damaged we reline it from the inside (trenchless pipe relining) — a permanent repair with no excavation in almost all cases.

How much does it cost to clear a blocked sewer in Melbourne?

It depends on the cause and access, which is why we run a CCTV camera first. Clearing a root blockage by jetting is a same-day job; relining a collapsed section costs more. You always get a fixed, upfront price before any work begins — no surprises.

What causes tree roots in a sewer line, and how do you stop them coming back?

Roots from established trees enter through cracks and old joints chasing moisture — very common in Melbourne's leafy east and the Ranges. Hydro jetting cuts them out, but if they keep returning the pipe itself needs sealing, which is what pipe relining does — it removes the entry points for good.

Who is responsible for a blocked sewer — me or the water authority?

Generally the property owner is responsible for sewer pipes within the boundary, and the water authority for the main in the street. Most blockages (roots, cracked house drains, gully overflows) are on the property side. Our camera confirms exactly where the issue is, so you know who's responsible.

Do you offer emergency and same-day blocked sewer service?

Yes — a backing-up sewer is an emergency, and we offer same-day service across Melbourne's east and the Yarra Ranges, including after hours. See our emergency plumbing page or call Jack directly.

Sewage is coming up in my shower — what should I do right now?

Stop all water use immediately — every flush, shower or machine cycle adds to the overflow. Keep people and pets away from affected areas and call 0425 226 636. Sewage rising through floor wastes means the main sewer is fully blocked; it’s a same-day emergency and we treat it as one.

I’m renting and the sewer is blocked — who pays?

In Victoria, a blocked or broken toilet and sewer system counts as an urgent repair, and it’s normally the rental provider’s cost to fix unless the blockage was caused by misuse. Report it to your property manager straight away — we work with property managers across Melbourne’s east and can invoice them directly.

Book Your Blocked Sewer Job Today

Don't wait on a backing-up sewer — book a sewer inspection or clearing with a Victorian plumber today.