A foul or sour odour indoors or around an external gully. It usually means either a trap seal has dried out or evaporated, or waste is sitting in a restricted pipe long enough to decompose.
What it means for you
If the smell gets worse after rain or in warm weather, treat it as a drainage fault rather than a cleaning problem.
Not sure whether this applies to your property? Ask us. There is no call-out charge and the price is fixed before any work starts.
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