Drain diagnosis · method matched to cause4.9340+ reviews

Sink not draining? Find the blockage.

Kitchen, bathroom, toilet or floor drain: we assess the affected run, choose a suitable clearing method and confirm whether the work requires a PUB Licensed Plumber.

Required PUB LP identified HDB renovation registered Timing confirmed before booking
Hair · grease · sludgeCleared in 30 min
Sink · shower · floor drain · kitchen
Where it's blocked

Pick the drain.

Location, access and blockage depth shape the method and quote.

Kitchen sink
Typical: Grease + food residue

Grease, food residue or a trap obstruction may be involved. We identify the accessible blockage and choose a method suitable for the pipe and location.

After diagnosisQuoted
Bathroom shower / sink
Typical: Hair + soap residue

Hair and soap residue are common, but the obstruction may sit in the trap or farther along the run. Access and method are checked first.

After diagnosisQuoted
Toilet
Typical: Paper + non-flushable items

A plunger or suitable toilet auger may clear an accessible blockage. Deeper or recurring problems can require further investigation.

After diagnosisQuoted
Floor drain
Typical: Hair + residue + sediment

Floor-trap access and the affected branch vary. We avoid promising that the shared stack can be reached or cleared from inside the unit.

After diagnosisQuoted
Catch it early

Four signs of a forming clog.

Sink drains slowly

Water sits + drains over a minute. The clog is partial — there's still flow around it. Worth clearing now before it becomes a full block.

Gurgling sound when draining

Air being forced back through trapped water = the run is partially blocked downstream. Listen for it on the toilet, sink, or floor drain.

Bad smell from the drain

Bacterial decay of trapped organic matter (grease, hair, food). Often the FIRST sign before slow-drain even shows up. Don't just pour bleach — clear the matter.

Water backs up into another drain

When you run the kitchen sink and water rises in the floor drain, it's the shared horizontal run downstream that's blocked. Bigger job — usually needs the riser snake.

On-site protocol

Five steps from symptom to flow test.

01
Diagnose by symptom
Slow vs full block, single drain vs shared, smell vs no smell — tells us where to start probing.
02
Start with a suitable manual method
Where appropriate, a plunger or manual probe can test whether the obstruction is close to the fixture.
03
Use appropriate clearing equipment
Mechanical or other equipment is selected for the fixture, pipe, access and suspected obstruction; one tool is not right for every drain.
04
Flush where suitable
Once flow is restored, the plumber uses a flushing method compatible with the pipe and advises against unsuitable chemicals or temperatures.
05
Flow test + findings
We check drainage under normal use and explain observed findings, limitations and any need for shared-stack or managing-agent escalation.
Frequently asked

Common questions.

Done with the slow drain.

Send a photo of the problem drain and your postcode. We'll confirm availability and explain whether the final quote needs on-site diagnosis.

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Clogged drain is one of several plumbing services. See the full list
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