Plumber Randwick | Licensed, 24/7, Fixed Pricing

One stack, everybody's habits, one flat that wears it

A house has its own drain and its own problems. A walk-up has one or two stacks serving every flat in the building, and that changes both the cause and the consequence.

The cause is collective. Everything anybody in the building puts down a toilet or a sink shares the same line. In a suburb where a large share of flats turn over every year or two, because of the hospitals and the university nearby, there is no shared memory of what that drain has been asked to cope with.

The consequence lands in one place. Water backing up in a blocked stack surfaces at the lowest opening, which is the ground floor flat. That occupant did not necessarily contribute anything to the blockage and is frequently a tenant who cannot authorise the repair either.

So we clear it, and then we tell you plainly whether it was the building's line or that flat's. Those are different bills and different people.

Call 1300 381 569 Book a look

Same-day clearingCleared without flooding the flat below
Stack or lot, establishedSo the right party is billed
Camera on any repeatThe committee sees the pipe, not an opinion
Licensed plumberNSW Licence 368473C, fully insured

Local drain guide

Why drains block in a Randwick walk-up

The lowest opening is the relief point

A stack takes everything from the flats above and carries it down to the sewer. Block it below the lowest connection and the water has nowhere to go but back up, surfacing at whichever opening sits lowest.

In these buildings that is the ground floor bathroom or laundry. It is worth understanding because the flat that floods is regularly blamed for a blockage it had no part in.

High turnover means no shared memory

Randwick's population is shaped by four hospitals and a university, so a large proportion of these flats are rented on short postings.

Nobody in the building necessarily knows what has gone down the stack over the last decade, or that it blocked twice before. That is the honest case for filming a repeat rather than clearing it a third time and hoping.

Old cast iron narrows from the inside

Original stacks in interwar blocks are frequently cast iron, and cast iron corrodes inwards. The rust scale builds up on the bore rather than falling away.

So the usable diameter shrinks year by year while the outside of the pipe looks entirely sound. A stack that coped for fifty years starts blocking on things it used to pass, and no change in anyone's behaviour explains it.

Wipes are worse in a block than in a house

They clear the bowl and then do not break down. In a shared stack that failure is multiplied by however many flats are contributing.

One household's habit becomes the whole building's blockage, and the person who discovers it lives at the bottom. In a block with recurring problems, a note in the entry does more than another clearing.

Who pays is a separate question from what is wrong

Pipework serving one flat is generally that owner's. The shared stack is generally the owners corporation's. But a stack blockage presents inside somebody's bathroom, so it looks personal when it is not.

In a self-managed block there is often no one to make that call, so we put the finding in writing. It is what the committee needs in order to act, and it stops the wrong person paying.

What we clear the same day

Toilets, showers and floor wastes backing up
Kitchen and laundry lines running slow
Shared stacks cleared without flooding the lowest flat
Camera and footage on anything that has recurred
Written finding on stack versus lot pipework

Call 1300 381 569

Our Randwick service area

Map data © OpenStreetMap contributors, tiles © CARTO.

What clearing a blocked drain costs in Randwick

Quoted at a fixed price before it starts. These are indicative 2026 ranges. On a repeat in a block, the camera is the line worth paying for, because the footage is what lets a committee decide between clearing it again and dealing with the pipe.

Clear a blocked drain $150 – $400

Hand tools or an electric eel through an existing access point, in a house or a single lot.

Shared stack clearing $250 – $550

Access in a common area, with the lowest flat protected while the line is cleared.

Camera inspection $250 – $450

Down the stack with footage handed over, showing scale, bore and what is actually catching.

Jetter on a stubborn line $400 – $700

High-pressure water where an eel will not do it, or to flush a scaled cast iron stack.

Written finding included

Stack or lot, with reasoning. What a self-managed committee needs to act on.

How a blocked drain call-out runs.

Step 01

Taking a blocked drain call for a Randwick property

House or flat, and has it happened before?

In a block those two answers decide whether we are looking at one bathroom or at the stack the whole building shares.

Step 02

Clearing a blocked stack at a Randwick apartment block

Cleared from the nearest access

Working from the closest existing point so nothing backs up further through the lowest flat while we clear it.

Step 03

Camera inspection of a shared stack in Randwick

Filmed if it has recurred

The footage shows whether this is what people are flushing or a cast iron bore that has closed up over fifty years.

Step 04

Explaining drain camera footage to a Randwick owners committee

You get told whose line it was

In writing. It is what stops the ground floor flat paying for the building's pipe.

Blocked drain questions.

What Randwick locals ask us before booking a plumber.

Ask us yours Licensed plumbing van covering Randwick and the surrounding suburbs

Why does it always back up in the ground floor flat?

Because that flat is the lowest opening on a stack the whole building uses. A walk-up typically runs one or two stacks serving every unit above, so when the line blocks below the lowest connection, the water backing up has to surface somewhere and it surfaces at the bottom. The flat that floods is very often not the flat that caused it. That matters when somebody starts assigning blame, and it is worth saying early.

Nobody in the building knows what went down it. Is that normal?

Here, completely. Randwick sits inside the largest collocated health precinct in NSW, with four hospitals and a university nearby, so a great many flats turn over every year or two. In a twelve-unit block a fair number of the occupants may have moved in within the last twelve months. There is no institutional memory of what the drain has coped with, which is exactly why we camera a repeat blockage rather than guess at it.

Is a blocked stack the owners corporation's problem or mine?

Generally, pipework serving only your flat is yours and the shared stack is the owners corporation's. In practice a blockage in the stack presents inside one person's bathroom, so it looks like theirs. We establish which it is and put it in writing, because in a self-managed block with no building manager there is usually nobody else who will.

Are “flushable” wipes actually flushable?

No. They clear the bowl, which is all the label really promises, then fail to break down the way paper does. In a shared stack they are considerably worse than in a house, because one flat's habit becomes everybody's blockage and the person who finds out is whoever lives at the bottom. If a block has recurring issues, a note in the building about wipes does more good than most plumbing.

Do chemical drain cleaners work?

Rarely, and in a block they make things worse. They sit against the blockage rather than passing through it, they generate heat, and in old cast iron or galvanised they attack the pipe as readily as the obstruction. They also make the water we then have to work in caustic, in a stack shared with other people's bathrooms. If someone has poured one down, tell us when you call rather than after we have opened it.

Should we put a camera down it?

On a first blockage, usually not. Something went down, we clear it, done. On a second in the same stack inside a year, yes, and in a building of this age it is worth the committee seeing the footage. Original cast iron scales inward as it corrodes, so the usable bore narrows steadily while the outside of the pipe looks perfectly sound. The camera is what tells you whether you are dealing with what people flush or with the pipe itself.

What does it cost to clear a blocked drain in Randwick?

Most clears through an existing access point are $150 to $400. On a shared stack where the access is in a common area, $250 to $550, because getting to it and protecting the flat below takes longer. A camera inspection is $250 to $450 with the footage handed over, which on a repeat in a block is the thing worth paying for. We say up front whether the cost should be landing on a lot owner or on the owners corporation.

Blocked drains cleared
across Randwick

Get a drain callback

One stack, everybody's habits, one flat that wears it

Ground floor and it keeps happening?