Weald Clay and wet drainage fields
Soil surveys around Billingshurst describe the ground as seasonally waterlogged clay, with thin bands of sandstone running through it. In practice, a drainage field can work happily all summer and then struggle from November to March, when the clay is full and the water has nowhere to go.
If your drains slow down every winter, emptying the tank buys time but won’t cure a failing field. We can look at the field and tell you honestly whether it needs repairing or replacing. On this ground, a new field usually has to be bigger than the old one to cope.
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