Soakage pits are an excellent option for conservation and self-sustainability. Essentially a form of onsite disposal where a hole approximately one metre square is dug, lined with scoria, allowing storm water to be deposited into it.
Soakage pits are remarkably effective if your soil has capacity for soakage. In areas like Mt Albert to Mt Wellington it is great – essentially anywhere there is a mountain and scoria already in existence. Your Local Plumber would not recommend you use soakage pits if you live in clay based areas such as West Auckland or Remuera to St Heliers.