Odour
Investigation

Drain Odour Investigation Services

Persistent drain smells are unpleasant and can indicate a blockage, build-up, trap issue, or a defect allowing sewer gases to escape.

The key is identifying where the odour is entering and why. Once the mechanism is clear, the fix is usually straightforward: cleaning, restoring traps, repairing defects, or improving ventilation.

When you might need this service

You notice recurring odours in bathrooms, kitchens or near external gullies, especially after heavy use or windy conditions.

Smells persist even after basic cleaning or DIY attempts, suggesting an underlying defect or airflow issue.

build up in pipes that leads to drain odour

Do you need an odour investigated?

Call to book a visit, or email to request a quote. For urgent issues such as overflow or backups, contact us as soon as possible

Common causes of Drain Odour

Build-up and partial blockages can hold decomposing waste that produces odours.

Odours can also come from dried trap seals, faulty connections, damaged pipework or defects that allow sewer gases to escape.

The Hydrajetting Approach

We start with practical checks of likely entry points and then clear and clean where build-up is suspected. If the issue persists, CCTV helps identify defects or restrictions.

Where required, additional diagnostic approaches such as smoke testing can help identify hidden breaches or improper connections that allow odours into the property.

What's included?

  • Initial assessment of likely odour entry points
  • Clearing/cleaning where build-up is suspected
  • CCTV inspection to identify defects or restrictions
  • Advice on trap seals and ventilation
  • Repair plan if a defect is confirmed
replacement sink traps to eliminate drain odour

Why choose Hydrajetting?

  • Structured diagnosis rather than guesswork
  • Clear explanation of causes and fixes
  • Ability to repair defects we find
  • Local coverage across Sussex & Surrey
FAQs
Can a blockage cause a drain smell?

Yes. Partial blockages and build-up can trap waste and create persistent odours until the line is properly cleaned and flowing.

Smoke testing introduces non-toxic smoke into the system and highlights leaks or breaches by showing where smoke escapes, which can pinpoint odour routes.

CCTV is excellent for internal pipe defects and restrictions, but airflow issues and hidden breaches may require additional checks.

Often, yes. If a fixture is unused, the water seal can evaporate and allow smells to rise into the room.

Some odour causes are identified quickly. Hidden defects can require CCTV and targeted diagnostics to confirm.

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