Guide · Updated August 2026

Blocked Drain Specialist vs General Plumber: Who Should You Call?

Every plumber can put a machine down a drain. Not every plumber carries a camera to see what caused the blockage in the first place. Here's the honest difference between a blocked drain plumber and a general plumbing company — and the jobs where you should ring someone else instead of me.

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Reviewed and updated August 2026

💡 Quick answer: Call a blocked drain plumber when the problem is the drain itself — a blocked toilet, a blocked sink, a sewer back-up or a blocked storm water line. A drain specialist carries a jetter, a CCTV camera and a pipe locator every single day, so the cause gets found rather than just cleared. Call a general plumbing company for everything that isn't the drain. Not sure which you've got? Ring Jack on 0425 226 636.

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Most people who ring me have already had a go themselves. The plunger came out, then the bicarb and vinegar, then a bottle of supermarket drain cleaner, and maybe a hired jetter off the back of a ute. None of it moved. So now it's a phone decision: do you ring the plumbing company on the fridge magnet, or someone who does blocked drains and nothing else?

Both are real plumbers. Both are BPC Registered. The difference isn't skill or honesty — it's what they do all day, and what that means for the gear in the van and the way the job gets diagnosed.

Blocked Drain Plumber vs General Plumbing Company: The Short Version

A general plumbing company is built for breadth. A blocked drain plumber is built for depth in one pipe. If your problem lives in a drain, depth wins; if it doesn't, breadth wins.

That's the whole argument, and it's worth being blunt about the limits of it. Specialising means saying no to a lot of work. I don't want the jobs that aren't drains, and a good general plumbing outfit doesn't want a 40-metre sewer jetting job in a Dandenongs backyard on a Sunday. Everyone does better when the right van turns up.

It Starts With What's on the Van

You cannot diagnose what you cannot see, and you cannot see anything without a camera. That single sentence explains most of the difference between the two call-outs.

A general plumbing company's truck has to cover a huge range of household work. Drain gear is one item on a list of twenty, so it's usually a compact drain machine — good for a hairball in a basin trap, outmatched by a root mass in a 100mm earthenware sewer. A CCTV camera and a decent jetter are expensive bits of kit that sit idle unless you're using them daily, so they're often hired in for the jobs that clearly need them.

A drain specialist's van is the opposite shape. Mine carries the same four things on every single job:

💦 A high-pressure jetter

Jet blasting scours the pipe wall instead of punching a hole through the middle. Same machine, different names depending on who you ask — hydro jetting, sewer jetting, drain jetting. Different heads for roots, grease, silt and storm water.

📷 A CCTV drain camera

A CCTV drain inspection is the only way to see the cause and the pipe's condition. You watch the screen with me. No camera means the diagnosis is a guess wearing a uniform.

📍 A pipe locator

The camera has a sonde in the head, and the locator tracks it from the surface. That's how a fault gets marked to a spot and a depth — so nobody digs a trench across your lawn hoping.

🔧 A range of cutting heads

Roots, fat, wet wipes, sand and leaf silt all want a different nozzle. Carrying one head and using it for everything is how a job gets half-done.

If you'd rather not read the whole page, that's the phone call in one question: "do you carry a camera and a jetter on the van, or do you hire them in?" The answer tells you what kind of visit you're booking. If you also want the warning signs on price-baited call-outs, that's covered separately in our piece on the $99 blocked drain trap.

Clearing a Drain and Diagnosing One Are Different Jobs

A generalist's brief is usually to get water moving and get to the next job. A specialist's brief is to find out why it stopped moving. Both are legitimate, but only one of them ends the problem.

Drain unblocking without a camera is a coin toss on the cause. Was it a wad of wipes that's now gone? Roots at an earthenware joint that will be back by spring? A belly holding water halfway down the run? You genuinely cannot tell from the surface — the flow looks identical in every case once the water's away. We've written the causes up in full in why does my drain keep blocking, so I won't relitigate it here. The point for this page is simply that the camera is what separates "cleared" from "diagnosed", and the camera lives on the van of the bloke who does it every day.

Doing Drains Every Day Builds Pattern Recognition

Volume is an underrated part of specialising. When you look down several hundred pipes a year in the same handful of suburbs, you stop starting from scratch.

Some of it's the sound and feel before the camera even goes in — the way the hose loads up at a certain distance, the smell at the shaft, whether the water level drops in a rush or a crawl. Then the picture confirms it: fine roots feathering in at a joint every 1.5 metres, which is the length of old earthenware pipe sections; a mirror-flat pool of water sitting in a sag; a hard scale of grease from a kitchen line that's never been jetted; a hairline fracture with soil weeping in behind it. A general plumber who sees that picture six times a year will get there too — they'll just take longer, and they're more likely to hand it on afterwards.

That speed is also why a specialist can give you a straight answer on the phone before anyone drives anywhere. Describe the symptoms accurately and there are only so many things it can be.

Not sure whether it's a drain problem at all?

Describe what's happening and Jack will tell you in about two minutes what it needs — and if it's not a drain, he'll say so.

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Specialist vs General Plumbing Company: Side by Side

Here's the comparison stripped back to the five things that actually change your outcome.

	Blocked drain specialist	General plumbing company
On the van daily	Jetter, CCTV camera, pipe locator, multiple cutting heads	A compact drain machine among tools for twenty other trades
How the cause is found	Camera down the line — you see the cause on screen	Inferred from flow and experience; camera often hired in later
Typical outcome of the visit	Drain cleared, pipe scoured, cause identified and explained	Water moving again — which is sometimes all you need
If it blocks again	You already know why, and roughly when to expect it	Back to square one — a second call-out at full rates
Who does the repair	Same outfit — reline, re-lay or repair the failed section	Usually referred on to a drainage contractor

Why the Cheaper Call-Out Often Isn't

The maths that matters isn't the price of one visit — it's the price of getting the drain sorted. A clear-and-leave that comes back in six weeks is two attendances, and the second one is never cheaper than the first.

Straightforward jobs sit in a fairly predictable range. A blocked drain plumber cost in Melbourne generally runs $300–$750 depending on severity, access and how much of the line needs jetting — the full breakdown is in our blocked drain cost guide. Compare that to two or three cheaper clears across a year, and the "expensive" option usually turns out to be the one that only happened once.

There's a second cost that doesn't show on any invoice: the months you spend not knowing. A drain that's been cleared but never looked at is a pipe you're guessing about every time it rains.

What Happens After the Clear

This is where the two paths separate most sharply. Once the line's flowing and the camera shows a real fault — roots at a joint, a cracked section, a collapsed run — someone has to fix it. A specialist already does that part; a generalist typically hands it over.

On our side that means pipe relining where the pipe still has structure, a dig-and-replace where it doesn't, and honest advice about which one your pipe deserves. We publish what drives pipe relining cost and what a collapsed drain repair actually involves, so nothing about the next step is a surprise. Being handed on isn't a disaster — but it does mean paying two lots of travel, two lots of assessment, and repeating the story to a second tradesman who has to camera the line again anyway.

Local Knowledge: Melbourne's East Isn't One Drainage System

Where you live changes the job more than most people expect, and that's knowledge you only build by working the same ground repeatedly.

Across the outer east there are several different councils in play and two different water retailers — the sewer authority genuinely differs from suburb to suburb, which changes who you ring about the section of pipe past your boundary. The established suburbs are full of old earthenware sewer, laid in short sections with joints every metre and a half, and every one of those joints is a doorway for roots. The leafy belt adds decades of mature gums and liquidambars sitting right over the line. Up in the Dandenongs you get steep clay-and-granite blocks where storm water moves fast, cuts channels and silts up pits, and where surface run-off ends up somewhere it wasn't designed to go.

Practically, that shows up as different jobs in different postcodes: root-heavy sewer work through Boronia and Ferntree Gully, ageing earthenware through Croydon and Ringwood, silt and leaf-choked storm water through Belgrave and Lilydale. Same trade, different diagnosis before I've even parked.

When You Should Call a General Plumber Instead

Specialising cuts both ways, so here's the honest bit: if the problem isn't in a drain, I'm not the right phone call. Water Serpent does blocked drains and drainage repairs — that's the whole business, and there's a long list of plumbing work we don't touch.

Ring a general plumbing company when it's:

No hot water, or a hot water unit that's leaking, noisy or past its life.
A burst pipe or a leak in the pressurised water supply inside your walls, floor or roof space.
A leaking or dripping tap, a running toilet cistern, or a mixer that needs replacing.
Anything gas — appliances, gas lines, gas leaks. That's a gas-specific ticket.
Roof plumbing — gutters, downpipes above ground, flashings and roof leaks.
Bathroom or kitchen renovation rough-ins, fixture installs and fit-offs.

Plenty of general plumbers are excellent at exactly that work, and it's work I'd send my own family to them for. The line is simple: if it's the pipe carrying waste or storm water away from the house, it's a drain job. If it's the water or gas coming in, or the fixtures themselves, it's a general plumbing job.

One grey area worth naming. An emergency plumber in Melbourne after hours may be a generalist on a rotating roster — fine for making a mess safe, but if the emergency is sewage backing up through a floor waste or an overflow relief gully, you still want a drain specialist to attend and camera it before you pay for anything permanent. That's exactly what our emergency blocked drain service is for.

Blocked drain? Find the cause once.

Camera down the line, cause on screen, and a fixed upfront price agreed before any work starts.

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Frequently Asked Questions

What's the difference between a blocked drain specialist and a regular plumber?

A general plumbing company covers a wide range of household plumbing, and drain work is one line on a long list. A blocked drain plumber does drains and nothing else, which means a jetter, a CCTV camera and a pipe locator are on the van every single day rather than hired in. The practical difference is diagnosis: a specialist finds the cause, not just the flow.

Can any plumber clear a blocked drain?

Most can get water moving again, and plenty of general plumbers do a tidy job of it. The limit is equipment and time. A small drain machine punches a hole through a blockage without scouring the pipe walls, and without a camera nobody can tell you whether the line is sound, root-invaded or sagging. That is where a drain specialist picks up.

Is a drain specialist more expensive than a general plumber?

Not usually, once you count the whole job. A blocked drain plumber cost in Melbourne generally lands between $300 and $750 depending on severity and access, and that is one attendance with the cause identified. A cheaper clear that comes back in six weeks means a second call-out, and the second one rarely gets cheaper.

Do I need a CCTV drain inspection or just a clear?

If it is a first-time blockage in a newer home, a clear is often enough. Book a CCTV drain inspection when the drain has blocked before, when more than one fixture is affected, when the house has old earthenware pipes, or when you are about to spend money on a repair. You should not pay to dig or reline a pipe nobody has actually looked at.

Why does my drain keep blocking after it's been cleared?

Because clearing and fixing are different jobs. If roots, a sag in the line or a cracked section caused the blockage, pushing a hole through the middle restores flow but leaves the cause sitting there. The pipe silts up again on the same spot, usually within weeks or months. Finding the cause once is what breaks the cycle.

What equipment should a blocked drain plumber bring?

At minimum: a high-pressure water jetter with a range of cutting and flushing heads, a CCTV drain camera with a sonde, and a pipe locator so the camera head can be tracked from the surface. That combination clears the line, shows you the cause on screen and marks the exact spot and depth of a fault before anyone talks about digging.

Who do I call for a blocked storm water drain?

A blocked drain plumber. Storm water lines are usually shallower, longer and full of silt, leaf litter and roots from surface pits, and they are frequently the wrong pipe to send a small drain machine down. Jetting plus a camera is the sensible pairing. Blocked stormwater drains in Melbourne tend to announce themselves in the first heavy rain after autumn.

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