Forest Green and Walliswood: the clay end
The southern part of Abinger sits on Weald clay, and some of its streams flow south towards the head of the River Arun rather than north to the Tillingbourne. Clay stays wet for months, so a drainage field here relies on the tank holding back as much sludge as possible. An overdue empty is often behind a soggy field.
If your field is wet all winter, an empty may not fix it on its own. A septic tank survey checks the tank, the outlet and the field, so you know whether something needs repairing.
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