Home / Soakaway Design Drainage Area 100m2 or Less Soakaway Design Drainage Area 100m2 or Less£200.00 Quantity Add to cart Description Description This soakaway design package is for drainage areas measuring 100m2 or less. The package is designed to take the hassle away from designing your own soakaway and also ensures that the soakaway that you install is designed correctly and fit for purpose. How it works………. Measure the area to be drained to the new soakaway. This particular design package is for drainage areas measuring 100m2 or less. Please ensure that you include all of the area to be drained to the soakaway including patios and driveways etc if applicable. When measuring a building please ignore the pitch of the roof, length x width will be fine.