Floor Trap Choke and Smell Singapore | Clearing

Last updated: 2026-10-11

Plumbline passes floor trap requests to plumbers in Singapore. The floor trap is the drain in your bathroom floor, and it does two jobs: it drains water and it holds a little water in a bend to keep sewer smells out. When it chokes, water pools; when its water seal dries out or breaks, it smells.

What the plumber does first

The plumber lifts the grating, clears hair and soap build-up from the trap, and checks whether the blockage is in the trap or further down the pipe. For a smell, they check the water seal and whether the trap or its seal is damaged.

Choke or smell?

Water pools and drains slowly: hair and soap scum in the trap, the most common cause.
Smell, but it drains fine: the water seal has dried out (common in a rarely used bathroom) or the trap is damaged. Pour a bucket of water in first; if the smell goes, it was a dry trap.
Gurgles when the toilet flushes: the blockage is further down, where the toilet and floor trap join.

Who can do it

Replacing floor trap gratings and covers and clearing blockages in floor traps are on PUB's list of simple works that do not need a Licensed Plumber (PUB). Replacing the trap or pipework itself is regulated work.

What is included

Grating lifted and trap cleared
Pipe cleared if the blockage is deeper
Water seal checked
Grating replaced if broken
Test with running water
Price agreed before work starts

DIY, a quick fix, or a proper job

	DIY	Quick fix	Proper job
Clears hair and scum	Top layer only	Yes	Trap and pipe
Fixes the smell	If it was a dry trap	Rarely checked	Seal and trap checked

What it costs

Floor trap clearing is usually priced like other choke work, from about S$60 at the low end of published 2026 Singapore rates (published 2026 rates).

Try the cost estimator or read the plumber cost guide.

Related guides

How it is done

Send a request. Choke, smell or both, and which bathroom.
Price. Quoted before the visit.
Clear and check. Trap cleared, seal checked, tested.
Pay the plumber. Directly, with a receipt.

Questions people ask

Why does my bathroom smell like a drain?

Usually the floor trap's water seal has dried out, which happens in bathrooms that are rarely used. Pour water in. If the smell returns quickly, the trap may be damaged.

Is floor trap clearing licensed work?

No. PUB lists clearing floor trap blockages and replacing gratings among the works a handyman may do.

Is there a charge for sending a request?

No. Sending a request costs nothing. The plumber tells you the price before any work starts.

Floor Trap Choke and Smell