Drainage & blocked drains in Staines-upon-Thames

Yes. Nothing you do to a drain will hold back the Thames, but a silted gully has no capacity at all, so ordinary rain backs up long before flooding is a factor. Clearing gullies and surface water runs before winter is what makes a normal wet week manageable.

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On the gravel here the water table is high, and where a joint has opened below it the pipe takes groundwater in continuously. It runs part-full, loses the flow that keeps it clean and silts. A survey locates the defect and a liner seals it, which is what stops the cycle.