Smells & pests
Heavy rain surcharges the sewer, pushing air and gas back through the system. Where a trap seal is weak, a vent is blocked or a pipe is cracked, that displaced gas escapes into the property or garden — which is why the smell appears with the weather.
Check trap seals first, particularly in little-used fixtures and outside gullies. Rain-driven pressure changes find every weak seal in the system.
A blocked soil vent pipe amplifies the effect because the system has nowhere to breathe. Vents block with leaves and nests, especially in autumn.
Persistent post-rain smells outside can indicate a cracked drain being flushed by groundwater. A CCTV survey settles it.
We're a small, family-run team based in East Grinstead, on call 24/7 across East Grinstead and a 20-mile radius. No obligation — tell us what you're seeing and we'll tell you straight what it is.
0330 1331 347Related service: Drain Odour Investigation
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