Drainage & Blockages

Trap Replacement

Trap replacement fixes common under-sink and bath waste problems, including leaks, slow draining and unpleasant odours. The old or faulty trap is removed and a new, correctly sized trap is fitted and tested, helping your waste pipework seal properly and drain as it should.

More information

What trap replacement covers

A trap is the curved section of waste pipe that holds a small amount of water to block sewer smells. When it splits, loosens, or blocks, you can end up with leaks, lingering odours, or poor drainage. Trap replacement is a straightforward way to restore a reliable seal and normal flow.

  • Check the trap, fittings and nearby pipework to confirm the cause of the issue
  • Remove the faulty, poorly fitted, or damaged trap
  • Fit a new trap suited to the fixture (sink, basin, bath)
  • Renew washers and seals where needed for a watertight joint
  • Clear local debris and flush through to confirm improved drainage
  • Test for leaks under normal use before leaving
  • Practical advice to reduce repeat blockages and smells

When trap replacement is the right option

Trap replacement is usually the best next step when cleaning alone will not solve the problem, or when the trap itself is the weak point.

Typical reasons to book include:

  • Water dripping into a cabinet or pooling under a basin
  • A bad smell coming from the plughole, even after cleaning
  • Slow draining caused by a recurring build-up close to the trap
  • Cracked plastic, corrosion, or loose connections
  • A poor previous installation that will not seal properly
  • Preparing a rental or commercial washroom for reliable day to day use

How the service is delivered

Work is kept tidy and focused on getting your fixture back to normal use.

  1. Inspect the waste and trap assembly and confirm access.
  2. Protect the area, then disconnect and remove the old trap.
  3. Fit the replacement trap and align connections to avoid strain on joints.
  4. Run water, check flow, and test all joints for leaks.

Most trap replacements are completed in a single visit, depending on access and the condition of the existing pipework.

After the replacement

You can normally use the sink, basin, or bath straight away once testing is complete. If slow drainage persists, it may point to a blockage further along the waste line, and the next step can be discussed clearly so you can decide how to proceed.

Frequently Asked Questions

How do I know if my trap needs replacing?
Common signs include leaks under the fixture, a persistent smell from the plughole, or repeated blockages that return quickly. If the trap is cracked, warped, or will not seal even with new washers, replacement is usually the most reliable fix.
Can you replace a trap without replacing the whole waste pipe?
In many cases, yes. If the nearby pipework is sound and correctly sized, the new trap can be fitted to the existing connections. If parts are damaged or incompatible, only the necessary sections are changed.
Will replacing the trap stop bad smells?
If the smell is caused by a trap that is leaking, not holding water, or is poorly sealed, replacement should resolve it. If odours continue, it may be due to ventilation issues or a problem further along the waste line, which can be investigated.
How long does trap replacement usually take?
A straightforward trap replacement is often completed within about an hour. If access is difficult, fittings are seized, or there is a deeper blockage to clear, it can take longer. You will be kept informed before any extra work is done.
Is trap replacement messy or disruptive?
It is typically a low disruption job. Some water may be released when the old trap is removed, but the area is protected and the fixture is tested before finishing. Clear access to the trap area helps keep the visit quick and tidy.

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